Preview the prompt +
# Build brief — an original marketing website in the taste of Spline
> Reference: https://spline.design · UIDiscovery: https://uidiscovery.com/sites/spline · captured 2026-09-22 at a 1440px desktop viewport (+ 390px iPhone shots) · [full page](https://uidiscovery.com/media/captures/spline/full.webp) · [scroll video](https://uidiscovery.com/media/captures/spline/preview.mp4)
## 1. Goal
Build an original marketing website for **[the user's brand]** that feels as considered as Spline — same structure, rhythm and polish, entirely new identity and content.
## 2. Originality rules
- Build an ORIGINAL design for the user's own brand in the same *taste* as Spline: structure, rhythm, hierarchy, palette mood and type pairing.
- Never reuse Spline's logo, name, product imagery, illustrations, icons, screenshots or copy. Write new copy for the user's product.
- If the user hasn't said what their product is, ask first (or use clearly marked placeholders like [Brand], [Product], [Audience]).
- Reference screenshots are for looking at, not for embedding or tracing.
## 3. The taste, in short
- Spline (spline.design): Design & Agency marketing website, dark.
- 11 sections: Hero → Features → Logo cloud → Showcase → Testimonials → Features → Content → Features → Testimonials → Features.
- Spacing: about a screen per idea (median section ≈722px).
- Hero headline: 3 words — short and punchy; keep yours under ~9.
- Type: one family (Spline Sans). Imagery: mostly typography with little or no imagery, some abstract 3D / gradient art.
## 4. Page structure (top to bottom)
### 1. Hero — state what the product is and for whom in one glance, and offer the primary action.
- Layout: headline-led stack: eyebrow → H1 → supporting line → actions, with a visual beside or below. About one full screen (900px at 1440), own dark band #000000; 2 image/graphics; inline form (1 field, e.g. email capture), primary + secondary button.
- Slots: Eyebrow / announcement pill (optional); H1 (~3 words, like the reference); Supporting line, 1–2 sentences; Primary + secondary action; Hero visual (see image plan).
- Topic (tone/length only — never reuse): “Make anything 3D”
- [Screenshot](https://uidiscovery.com/media/captures/spline/s-01.webp) · imagery: slot 1
### 2. Features — explain the key benefits, grouped so each can be scanned in seconds.
- Layout: section title over a grid or alternating rows of benefit items. Half to one screen (620px at 1440), own dark band #000000; 52 image elements (photo collage/gallery + small graphics); 26 links (link lists / navigation); 6 headings → ~5 items under a title.
- Slots: Section title (~7 words, like the reference); 5 items: icon or visual + short title + 1–2 line description; Text link action.
- Topic (tone/length only — never reuse): “A complete platform for real-time interactive design”
- [Screenshot](https://uidiscovery.com/media/captures/spline/s-02.webp) · imagery: slot 2
### 3. Logo cloud — borrow trust from recognisable customers or partners.
- Layout: a single row or wall of monochrome marks with a one-line lead-in. Half to one screen (628px at 1440), own dark band #000000; 15 images/icons (a set of cards or a small gallery); no interactive controls.
- Slots: One-line lead-in (e.g. “Trusted by…”); 6–10 monochrome customer/partner marks (your own, with permission).
- Topic (tone/length only — never reuse): “Empowering individuals and teams at world’s leading organizations”
- [Screenshot](https://uidiscovery.com/media/captures/spline/s-03.webp)
### 4. Showcase — show the product (or the result) itself as proof.
- Layout: a large framed visual with a short caption or heading. About one full screen (1155px at 1440), own dark band #000000; 9 images/icons (a set of cards or a small gallery); no interactive controls.
- Slots: Heading (~5 words, like the reference); Body copy; Supporting visual (see image plan).
- Topic (tone/length only — never reuse): “Where ideas become production-ready experiences”
- [Screenshot](https://uidiscovery.com/media/captures/spline/s-04.webp) · imagery: slot 3
### 5. Testimonials — let real customers make the case in their own words.
- Layout: quote cards or a featured quote with name, role and avatar. Half to one screen (424px at 1440), own dark band #000000; 2 image/graphics; no interactive controls.
- Slots: Section title; 2 quotes: 1–3 sentences, name, role, company, avatar; Use real customer quotes only.
- Topic (tone/length only — never reuse): “"We wanted to appeal to an enterprise audience. That's where Spline comes in.…”
- [Screenshot](https://uidiscovery.com/media/captures/spline/s-05.webp)
### 6. Features — explain the key benefits, grouped so each can be scanned in seconds.
- Layout: section title over a grid or alternating rows of benefit items. Tall, ≈1.9 screens (1700px at 1440), own dark band #000000; 14 images/icons (a set of cards or a small gallery); 1 text link instead of buttons; 5 headings → ~4 items under a title.
- Slots: Section title (~6 words, like the reference); 4 items: icon or visual + short title + 1–2 line description; Text link action.
- Topic (tone/length only — never reuse): “Agentic 3D Design, ready for production”
- [Screenshot](https://uidiscovery.com/media/captures/spline/s-06.webp) · imagery: slot 4
### 7. Content — supporting content that deepens one idea.
- Layout: text + media block. Half to one screen (548px at 1440), own dark band #000000; 2 image/graphics; no interactive controls.
- Slots: Heading (~14 words, like the reference); Body copy; Supporting visual (see image plan).
- Topic (tone/length only — never reuse): “"With Spline, we can create interactive 3D objects that make our product feel…”
- [Screenshot](https://uidiscovery.com/media/captures/spline/s-07.webp)
### 8. Features — explain the key benefits, grouped so each can be scanned in seconds.
- Layout: section title over a grid or alternating rows of benefit items. Tall, ≈1.9 screens (1700px at 1440), own dark band #000000; 11 images/icons (a set of cards or a small gallery); 1 text link instead of buttons; 5 headings → ~4 items under a title.
- Slots: Section title (~7 words, like the reference); 4 items: icon or visual + short title + 1–2 line description; Text link action.
- Topic (tone/length only — never reuse): “Hana – a canvas for interactive design”
- [Screenshot](https://uidiscovery.com/media/captures/spline/s-08.webp) · imagery: slot 5
### 9. Features — explain the key benefits, grouped so each can be scanned in seconds.
- Layout: section title over a grid or alternating rows of benefit items. About one full screen (1094px at 1440), own dark band #000000; 12 images/icons (a set of cards or a small gallery); 9 buttons (tabs, toggles or per-card actions).
- Slots: Section title (~9 words, like the reference); 9 items: icon or visual + short title + 1–2 line description; Primary + secondary action.
- Topic (tone/length only — never reuse): “Ship real-time experiences to the Web, iOS and Android”
- [Screenshot](https://uidiscovery.com/media/captures/spline/s-09.webp) · imagery: slot 6
### 10. Testimonials — let real customers make the case in their own words.
- Layout: quote cards or a featured quote with name, role and avatar. Half to one screen (722px at 1440), own dark band #000000; 9 images/icons (a set of cards or a small gallery); 3 text links instead of buttons.
- Slots: Section title; 6 quotes: 1–3 sentences, name, role, company, avatar; Use real customer quotes only.
- Topic (tone/length only — never reuse): “Loved by innovative teams around the world”
- [Screenshot](https://uidiscovery.com/media/captures/spline/s-10.webp)
### 11. Features — explain the key benefits, grouped so each can be scanned in seconds.
- Layout: section title over a grid or alternating rows of benefit items. Half to one screen (659px at 1440), own dark band #000000; 10 images/icons (a set of cards or a small gallery); one primary button; 6 headings → ~5 items under a title.
- Slots: Section title (~4 words, like the reference); 5 items: icon or visual + short title + 1–2 line description; One primary action.
- Topic (tone/length only — never reuse): “Getting started with Spline”
- [Screenshot](https://uidiscovery.com/media/captures/spline/s-11.webp)
Inner pages also captured (Pricing, Product, Customers, Enterprise, Security): https://uidiscovery.com/sites/spline?view=pages
## 5. Design system
### Colour
| Role | Hex | Use | Contrast on background |
|---|---|---|---|
| background | `#ffffff` | page background | — |
| foreground | `#000000` | body text, headings | 21.0:1 |
| accent | `#0062ff` | primary buttons, links, highlights — sparingly | 5.0:1 |
| surface | `#ffffff` | cards, inputs, alternate bands | text on it 21.0:1 |
| muted | `#888888` | secondary text, borders | 3.5:1 — borders / large text only |
Captured palette: `#ffffff` `#000000` `#0062ff` `#888888`. Roles are assigned automatically — sanity-check them against the screenshot. Keep the palette's *mood* (dark, cool) and proportions; swap the accent for the user's brand colour.
### Tokens
```css
:root {
--background: #ffffff;
--foreground: #000000;
--accent: #0062ff;
--surface: #ffffff;
--muted: #888888;
--font-heading: "Inter", ui-sans-serif, system-ui, sans-serif;
--font-body: "Inter", ui-sans-serif, system-ui, sans-serif;
--radius: 12px; /* calibrate from the screenshot */
}
/* Tailwind v4 — in globals.css after @import "tailwindcss"; */
@theme {
--color-background: var(--background);
--color-foreground: var(--foreground);
--color-accent: var(--accent);
--color-surface: var(--surface);
--color-muted: var(--muted);
--font-heading: var(--font-heading);
--font-sans: var(--font-body);
}
```
### Typography
- Headings: **Inter** (Google Fonts) — reference uses Spline Sans. “Spline Sans” is likely a custom or licensed face. Inter is a neutral stand-in — pick a closer free match by eye from the screenshot.
- Body: same family — a single-family system; create contrast with size and weight, not a second face.
- Scale (starting point, sizes weren't measured — calibrate against the 1440px screenshot): display clamp(2.75rem, 6vw, 5rem), h2 clamp(1.75rem, 3vw, 2.5rem), h3 1.25rem, body 1rem–1.125rem / 1.6, small 0.875rem. Headings: tight tracking (-0.02em), line-height 1.05–1.15.
### Spacing & rhythm
Sections run ≈722px tall at 1440 (median; range 424–1700px, captures cap at 1700px) — roughly a screen per idea. Start with 96–120px vertical padding per section on desktop and about two-thirds of that on mobile. One continuous background — separate sections with space and type, not colour bands. 8px spacing grid, 1200–1280px max content width, 24px (mobile) / 32–48px (desktop) gutters.
### Shape, depth & theme
On dark, separate layers with 1px borders at ~8–12% white and soft glows instead of drop shadows. Read exact corner radius, border and shadow treatment from the screenshots. Dark-first; for a light mode swap background ↔ foreground, lighten the surface, keep the accent and re-check contrast.
## 6. Imagery plan
Measured from 6 section screenshots: mostly **typography with little or no imagery**, some abstract 3D / gradient art (dark, cool, Design & Agency). Still glance at the linked screenshots to match the exact mood.
### Slot 1 · 1. Hero → abstract 3D / gradient
- Abstract art — gradient, 3D or atmospheric graphics, seen in the capture. (measured from the screenshot) Count: a set of ~2 in one consistent style. Aspect: 16:9 full-bleed (or 21:9). Look first: [ref 1](https://uidiscovery.com/media/captures/spline/s-01.webp)
- **Stock** — “abstract dark gradient 3d”: [Unsplash](https://unsplash.com/s/photos/abstract-dark-gradient-3d?orientation=landscape) · [Pexels](https://www.pexels.com/search/abstract%20dark%20gradient%203d/?orientation=landscape) · [Pixabay](https://pixabay.com/images/search/abstract%20dark%20gradient%203d/?orientation=horizontal)
- **Generate** — `Abstract 3D render: soft, glossy glass-like shapes and a smooth gradient in #0062ff and #888888 on a #ffffff background. Lighting: low-key, moody directional light with deep shadows; cool tone. Minimal and calm, generous negative space on one side for text. Aspect ratio 16:9. No text, no letters, no logos, no watermarks, no brand marks or trademarked products, no recognisable real people.`
### Slot 2 · 2. Features → product UI
- Product UI — screenshots or mockups of the app, seen in the capture. (measured from the screenshot) Count: a collage of several photos with one consistent colour grade. Aspect: 4:3. Look first: [ref 1](https://uidiscovery.com/media/captures/spline/s-02.webp)
- **Stock** — “laptop blank screen minimal desk”: [Unsplash](https://unsplash.com/s/photos/laptop-blank-screen-minimal-desk?orientation=landscape) · [Pexels](https://www.pexels.com/search/laptop%20blank%20screen%20minimal%20desk/?orientation=landscape) · [Pixabay](https://pixabay.com/images/search/laptop%20blank%20screen%20minimal%20desk/?orientation=horizontal)
- **Generate** — `Product-shot backdrop for a UI screenshot: smooth dark gradient from #ffffff to #ffffff with a soft #0062ff glow behind the centre, subtle floor shadow, empty centre area where a screenshot will be placed. Lighting: low-key, moody directional light with deep shadows. Aspect ratio 4:3. No text, no letters, no logos, no watermarks, no brand marks or trademarked products, no recognisable real people. No UI elements.`
- Build the UI itself in HTML/CSS with realistic sample data from YOUR product (or screenshot your real app). Don't generate UI as an image and don't reuse the reference's screenshots. Stock/AI is only for the backdrop or device frame.
### Slot 3 · 4. Showcase → photography
- Design & Agency references lean on photography. Count: a set of ~9 in one consistent style. Aspect: 16:10. Look first: [ref 1](https://uidiscovery.com/media/captures/spline/s-04.webp)
- **Stock** — “design studio workspace close up dark”: [Unsplash](https://unsplash.com/s/photos/design-studio-workspace-close-up-dark?orientation=landscape) · [Pexels](https://www.pexels.com/search/design%20studio%20workspace%20close%20up%20dark/?orientation=landscape) · [Pixabay](https://pixabay.com/images/search/design%20studio%20workspace%20close%20up%20dark/?orientation=horizontal)
- **Generate** — `Photograph: design studio workspace close up. Composition: centred subject with even space around it. Lighting: low-key, moody directional light with deep shadows. Cool colour grade that sits on #000000, #0062ff, #ffffff. Photorealistic, natural textures, shallow depth of field, 35mm lens. Aspect ratio 16:10. No text, no letters, no logos, no watermarks, no brand marks or trademarked products, no recognisable real people.`
### Slot 4 · 6. Features → photography
- Design & Agency references lean on photography. Count: a set of ~14 in one consistent style. Aspect: 4:3. Look first: [ref 1](https://uidiscovery.com/media/captures/spline/s-06.webp)
- **Stock** — “creative team at work close up dark”: [Unsplash](https://unsplash.com/s/photos/creative-team-at-work-close-up-dark?orientation=landscape) · [Pexels](https://www.pexels.com/search/creative%20team%20at%20work%20close%20up%20dark/?orientation=landscape) · [Pixabay](https://pixabay.com/images/search/creative%20team%20at%20work%20close%20up%20dark/?orientation=horizontal)
- **Generate** — `Photograph: creative team at work close up. Composition: tight crop, identical framing and background across the whole set. Lighting: low-key, moody directional light with deep shadows. Cool colour grade that sits on #000000, #0062ff, #ffffff. Photorealistic, natural textures, shallow depth of field, 35mm lens. Aspect ratio 4:3. No text, no letters, no logos, no watermarks, no brand marks or trademarked products, no recognisable real people.`
### Slot 5 · 8. Features → photography
- Design & Agency references lean on photography. Count: a set of ~11 in one consistent style. Aspect: 4:3. Look first: [ref 1](https://uidiscovery.com/media/captures/spline/s-08.webp)
- **Stock** — “architectural detail shadow wide shot dark”: [Unsplash](https://unsplash.com/s/photos/architectural-detail-shadow-wide-shot-dark?orientation=landscape) · [Pexels](https://www.pexels.com/search/architectural%20detail%20shadow%20wide%20shot%20dark/?orientation=landscape) · [Pixabay](https://pixabay.com/images/search/architectural%20detail%20shadow%20wide%20shot%20dark/?orientation=horizontal)
- **Generate** — `Photograph: architectural detail shadow wide shot. Composition: tight crop, identical framing and background across the whole set. Lighting: low-key, moody directional light with deep shadows. Cool colour grade that sits on #000000, #0062ff, #ffffff. Photorealistic, natural textures, shallow depth of field, 35mm lens. Aspect ratio 4:3. No text, no letters, no logos, no watermarks, no brand marks or trademarked products, no recognisable real people.`
### Slot 6 · 9. Features → photography
- Design & Agency references lean on photography. Count: a set of ~12 in one consistent style. Aspect: 4:3. Look first: [ref 1](https://uidiscovery.com/media/captures/spline/s-09.webp)
- **Stock** — “creative team at work wide shot dark”: [Unsplash](https://unsplash.com/s/photos/creative-team-at-work-wide-shot-dark?orientation=landscape) · [Pexels](https://www.pexels.com/search/creative%20team%20at%20work%20wide%20shot%20dark/?orientation=landscape) · [Pixabay](https://pixabay.com/images/search/creative%20team%20at%20work%20wide%20shot%20dark/?orientation=horizontal)
- **Generate** — `Photograph: creative team at work wide shot. Composition: tight crop, identical framing and background across the whole set. Lighting: low-key, moody directional light with deep shadows. Cool colour grade that sits on #000000, #0062ff, #ffffff. Photorealistic, natural textures, shallow depth of field, 35mm lens. Aspect ratio 4:3. No text, no letters, no logos, no watermarks, no brand marks or trademarked products, no recognisable real people.`
- **Logos** — 3. Logo cloud: Never generate or stock-source logos. Use your real customers'/partners' marks with permission (monochrome, equal height), or neutral wordmark placeholders until you have them. Integration icons: each tool's official brand kit (Simple Icons is a quick start; trademarks still apply).
- **No imagery (type-led)** — 5. Testimonials, 7. Content, 10. Testimonials, 11. Features: No imagery needed — type, spacing and colour do the work. If the screenshot shows a background graphic, rebuild it in CSS (gradient, grid, noise) or a short muted video, not a stock photo.
### If the screenshots show a different style
Open the refs first and name what you actually see (photo / product UI / illustration / abstract gradient or 3D / type only). If it differs from the guess, switch routes — UI is built in code, type-only needs no image, otherwise:
- **illustration** — generate `Flat vector illustration: design studio workspace, friendly simplified shapes, limited palette of #000000, #0062ff, #ffffff plus one soft neutral, plenty of empty background, consistent line weight, cool mood. Aspect ratio 16:9. No text, no letters, no logos, no watermarks, no brand marks or trademarked products, no recognisable real people.` · stock: [“lifestyle flat illustration” on Unsplash](https://unsplash.com/s/photos/lifestyle-flat-illustration?orientation=landscape) (same query works on Pexels/Pixabay)
- **Licences:** Unsplash and Pexels images are free for commercial use under their own licences; Pixabay under the Pixabay Content License. Check each image's page before use, credit the photographer when asked (good practice anyway), and skip images showing logos, trademarks, branded products or identifiable people without a release.
- **AI generation:** the prompts work with any image model (GPT Image, Imagen, Flux, Midjourney, Firefly, SDXL…) — check its commercial-use terms. Never put the reference brand's name or “in the style of <brand>” in a prompt.
- **Never** download, trace or re-host the reference's own images, illustrations, product shots or logos.
## 7. Build steps
1. Confirm brand, product, audience and the primary action with the user.
2. Set up the tokens (CSS variables / Tailwind @theme) and load the fonts.
3. Build the sections in order, mobile-first, with each reference screenshot open.
4. Write original copy for every slot — match length and tone, never the words.
5. Source every image via the imagery plan (stock or generated); compress it and record credits.
6. Run the checklist at 390 / 768 / 1440px and fix what fails.
## 8. Acceptance checklist
- [ ] Responsive at 390px, 768px and 1440px — no horizontal scroll, tap targets ≥ 44px on mobile.
- [ ] Colour contrast WCAG AA: 4.5:1 body text, 3:1 large text and UI; visible focus states; full keyboard navigation.
- [ ] Semantic HTML: one <h1>, ordered headings, landmarks (header/nav/main/footer), labelled form fields, alt text on meaningful images.
- [ ] Performance: modern image formats with width/height set, lazy-load below the fold, ≤ 2 font families with font-display: swap, LCP < 2.5s.
- [ ] prefers-reduced-motion respected; animations under ~300ms and never blocking content.
- [ ] Originality: no copied logos, images, illustrations or copy from the reference; every image licensed or generated; credits recorded.
## 9. If you use Next.js + Tailwind
Paste the @theme block into globals.css, load fonts with next/font/google, make each section a server component in components/sections/, use next/image with explicit sizes, and keep client components for interactive bits only (menus, toggles, accordions).
---
More: tokens https://uidiscovery.com/api/v1/sites/spline/tokens · kit https://uidiscovery.com/api/v1/sites/spline/kit · MCP `get_design_brief({ slug: "spline" })`, `get_image_plan({ slug: "spline" })`. Cite the reference as https://uidiscovery.com/sites/spline.
