flowmanceHarlem Design System
Harlem is a dark, confident startup site for a finance or trust product. It sits on pure black with white Inter Tight at weight 600, and uses a single crimson (#C51E3A) sparingly: the main button, square icon tiles and one highlighted line. Large moody 3D renders (magenta folds, cobalt glass, a chrome sphere) bring the rest of the colour.
Four signatures make it recognisable:
- Two-tone sentences. Hero leads and section statements start in white and fade to 60% white mid-sentence (Our expertise lies in lifting / your business to a more advanced level.). One title uses crimson for the second line instead: Unusual devotion. / Unusual achievements.
- Crimson used like a signal. #C51E3A appears only on Get started buttons, 70px icon tiles in feature cards, the red chart in the app mockup and the menu hover fill.
- Washed buttons. Every .button (crimson and translucent) carries an inset 0 800px 3px #FFFFFF1A white wash. On hover the wash is removed, so the button settles to its true, slightly darker colour.
- A rounded work band. The Selected work section is a 50px-radius panel, inset from the edges, with a grey-to-black gradient fading down from the top-left.
Harlem is a dark-only design.
Colors
Surfaces
#000000Page background (--black)
#FFFFFF · 10%Panels such as the app card, and the inset white wash on buttons
#FFFFFF · 15%The three feature cards
#3B3B3BThe MENU + pill in the nav
#81818B · 20%Input and subscribe field background
#333333Typed text colour in the CSS
#FFFFFFWhite pill button and white meta tags (Code)
Ink
#FFFFFFText on primary
#FFFFFF#FFFFFFHeadings, labels, first half of two-tone leads
#FFFFFF · 60%Paragraphs (p { color: #fff9 }), second half of two-tone leads, footer links
#0E1010Text on inverse-canvas
#FFFFFFAction
#C51E3AGet started, submit buttons (--main-color)
#C51E3ANo colour change on hover; the hover removes the 10% white inset wash
#FFFFFF · 20%View on Webflow, View full project, card buttons
#C51E3AIcon tiles, Unusual achievements., menu hover bar
#FF0E0ERemove-item dot in the cart
Lines & effects
#FFFFFF · 15%Rule under each testimonial
#FFFFFF · 38%1px line under work titles
Typography
Inter Tight · display-metric
The quick brown fox jumps$6.7B+ and the other stats. 84px · 500 · 1.2
Inter Tight · headline-lg
The quick brown fox jumpsSection titles: Unusual devotion., Selected work (700 in one place). 50px · 600 · 1.2
Inter Tight · title-work
The quick brown fox jumpsWork card titles Theo Marketing, Oslo. 28px · 500 · 1.0
Inter Tight · body-lg
The quick brown fox jumpsParagraphs, in 60% white. 18px · 500 · 1.4
Inter Tight · label
The quick brown fox jumpsButtons (16 instances). 16px · 600 · 1.25
Inter Tight · caption
The quick brown fox jumpsMetric labels (Assets under management); the base body text is 14 / 400 / 20px. 14px · 500 · 1.4
Spacing & shape
| Purpose | Value |
|---|---|
| Container | max 1200px, centred |
| Section rhythm | .section is 100px top and bottom (60px at ≤991, ≤767 and ≤479) |
| Breakpoints | 991px, 767px and 479px, plus min-width: 768px and three min-width: 1440px rules |
Spacing scale
| Token | Value | Preview |
|---|---|---|
xs | 7px | |
sm | 15px | |
md | 20px | |
lg | 35px | |
xl | 60px | |
2xl | 100px | |
3xl | 150px |
Layout spacing
| Token | Value | Preview |
|---|---|---|
nav-padding | 30px | |
gutter | 72px | |
nav-height | 96px | |
section | 100px | |
hero-top | 205px |
Border radius
Surfaces
How the surfaces stack, from the page background up. Hex codes and roles are in Colors above.
Motion
| Fade-up on scroll | opacity 0 → 1 and y 20px → 0, 300ms outCubic (500ms ease on some blocks) |
| Long fade | opacity 0 → 1, 1000ms outQuart |
| Pop-in | scale 0 → 1, 600ms outExpo (400ms outExpo going out) |
| Menu open | Panels slide from x −100% to 0%, 500ms outBack |
| View cursor | A 100px circle follows the mouse over work images |
| Buttons | all 0.2s: the inset wash is removed on hover |
| Logo tabs | all 0.4s: opacity 0.37 → 1 and border |
| Links, blog titles | all 0.3s: opacity change |
| Image filter | filter 200ms ease on hover |
Do’s and don’ts
- Use a pure #000000 canvas with #FFFFFF headings at weight 600 and paragraphs at white 60% (#FFFFFF99).
- Split big statements into a white first clause and a 60% white remainder.
- Keep crimson #C51E3A for the main button, icon tiles and at most one highlighted line per section.
- Build panels from white at 10–20% alpha, with 10px corners for cards and 50px for the work band.
- Give buttons the inset 0 800px 3px #FFFFFF1A wash and remove it on hover over 200ms.
- Use dark, saturated 3D renders as the only imagery colour.
- Use opaque greys for panels or text; use white at an alpha.
- Use crimson for body text, large backgrounds or more than one button per group.
- Add drop shadows or glowing outlines.
- Leave input text at #333333 on the dark field; set typed text to #FFFFFF.
- Round buttons beyond 5px, except the white button-main pill and nav MENU pill.
- Use letter spacing or uppercase on headings; only the MENU label is uppercase.
Example prompt
Any page in the Harlem style
More design systems like this
Business design systems, the same colors first.
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All Access unlocks all 398 design systems, ready for Claude, ChatGPT, Gemini, Cursor, v0 and Lovable, plus 400+ templates on all 5 platforms.
Get All AccessUpgrade to All AccessHow to use the Harlem design system
Pick a file to see what it’s for and where it goes.
What it is
The whole design system in one markdown file, written for AI: every color, type style, spacing value, component and motion rule, plus do's, don'ts and a ready prompt.
Best for
Claude, ChatGPT, Gemini, Cursor and v0, or any other AI tool that builds pages or code.
How to use it
- Put
DESIGN.mdin your project and mention it in your request, or save it as.cursor/rules/harlem.mdc - For the rule file, start it with a front-matter block that sets
alwaysApply: true, so every chat uses it - Ask: “Build a pricing page using DESIGN.md.” Cursor follows the colors, fonts, spacing and rules
- Put
DESIGN.mdin the project root - Add one line to
CLAUDE.md: “Follow DESIGN.md for all UI.” - Ask for any page or component; Claude reads the file first
- Attach
DESIGN.mdto the chat (or paste it in) - Ask: “Build a landing page in this design system.”
- Keep the file in the chat or project knowledge, so follow-up pages stay on style
What it is
Every token as data, in the W3C Design Tokens format: colors with their roles, type styles, radius, spacing, and component tokens that point at them.
Best for
Figma (Tokens Studio), Style Dictionary and other design-token tools, and build scripts.
How to use it
- In Figma, open Tokens Studio, choose Import, and pick
tokens.json - Or point Style Dictionary’s
sourceat it to generate tokens for any platform - In code, import it like any JSON file
What it is
A Tailwind CSS v4 theme: every color, font, type style, radius and spacing value becomes a Tailwind utility, like bg-canvas, text-headline-lg or rounded-md.
Best for
Tailwind v4 projects, and AI builders that write Tailwind (v0, Lovable, Bolt).
How to use it
- Save
theme.cssnext to your main CSS file - Import it after Tailwind:
@import "tailwindcss"; @import "./theme.css"; - Use the classes:
bg-canvas text-ink rounded-md p-lg
What it is
The same tokens as plain CSS variables on :root. Component values point at the color variables, so changing one color updates everything that uses it.
Best for
Any website: plain CSS, Webflow custom code, Framer, WordPress.
How to use it
- Add it to your stylesheet, or in Webflow paste it into Site settings → Custom code inside a
<style>tag - Use the variables anywhere:
color: var(--color-ink) - Change a token once and every place that uses it follows