flowmanceBronx Design System
Bronx is a dark technology and marketing studio site. The page is graphite (#111314), the hero opens under a large violet light that bleeds down from the top, and everything else is white type, hard white hairlines and full-colour square images. Type is Inter Tight semibold at normal tracking; the drama comes from a white-to-transparent gradient on key words rather than from size or weight.
Four signatures make it recognisable:
- Fading words. The second hero line your business. and other key words use a left-to-right gradient fill from #FFFFFF to white at 15% (.gradient-text), so they dissolve toward the right. The Bronx. logo fades the other way, from a faint B to a solid x..
- Hard white rules. Section titles sit on a full-width 1px solid white rule (not a faint one): under the hero title, under What we do, under testimonials.
- Violet hero glow. A single violet light (#6F00FF family, background image plus a 231deg gradient) sits above the hero and fades into the graphite; a fainter violet haze returns at the right edge of later sections, but there is no violet in buttons, text or other UI.
- Image-first services slider. What we do is a horizontal row of large square-cornered image cards that runs off the right edge, each captioned with a title and a result metric (-42% Avg CAC reduction, 7x Avg ROAS increase).
Bronx is a dark-only design.
Colors
Surfaces
#111314Page background (--black)
#0E1010Full-screen menu background (--black-2), a step darker than the page
#171919The nav bar once you scroll (--black-3)
#222222The fill that rises behind a menu link on hover (--black-4)
#81818B · 20%Form inputs and the subscribe field
Ink
#111314Text on primary
#FFFFFFHeadlines, nav, labels
#FFFFFF · 70%Paragraphs (p { color: #ffffffb3 })
#FFFFFF · 60%Second half of the hero lead, service metrics, category labels, footer links
#FFFFFF · 40%The inactive language link IT
#FFFFFFAction
#FFFFFFThe pill button, blog tags, the round arrow button
#6F00FFThe hero glow only (linear-gradient(231deg, #6F00FF, transparent 91%))
Lines & effects
#FFFFFF1px rules under titles, menu link borders
#FFFFFF · 15%One faint 1px border; also the end stop of the gradient text
Typography
Inter Tight · display-metric
The quick brown fox jumpsThe three numbers in the metrics grid. 100px · 600 · 1.3
Inter Tight · headline-lg
The quick brown fox jumpsSection titles (What we do, Unlock your business's ultimate capacity for success.). 50px · 600 · 1.1
Inter Tight · lead
The quick brown fox jumpsTwo-tone hero lead. 28px · 600 · 1.4
Inter Tight · title-lg
The quick brown fox jumpsService card titles (Creative Content, B2B Marketing). 28px · 500 · 1.0
Inter Tight · body-lg
The quick brown fox jumpsParagraphs at 70%. 18px · 500 · 1.4
Inter Tight · label-lg
The quick brown fox jumpsButton labels, footer titles. 18px · 600 · 1.11
Spacing & shape
| Purpose | Value |
|---|---|
| Container | max 1200px, centred (.container) |
| Section rhythm | .section and .section-cta pad 100px top and bottom with 5% sides; .section drops to 60px at ≤991px and .section-cta to 60px at ≤479px |
| Breakpoints | 991px, 767px and 479px (Webflow defaults), plus min-width: 1440px rules |
Spacing scale
| Token | Value | Preview |
|---|---|---|
xs | 7px | |
sm | 16px | |
md | 30px | |
lg | 40px | |
xl | 50px | |
2xl | 81px | |
3xl | 100px | |
4xl | 150px |
Layout spacing
| Token | Value | Preview |
|---|---|---|
footer-bottom | 40px | |
section | 100px | |
nav-height | 100px | |
hero-bottom | 120px | |
hero-top | 190px |
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, y 20px → 0, 300ms outCubic (or 500ms ease) |
| Slow fade | opacity 0 → 1, 1000ms outQuart |
| Button roll | Label out, arrow in from y 100px, 500ms outExpo (y → 0%) |
| Nav on scroll | Background to #171919, 500ms, triggered by page scroll |
| Menu link hover | #222222 fill grows in height, 400ms outCubic; border change 200ms outSine |
| Cursor circle | scale 0 → 1, 600ms outExpo; out → 0, 400ms outExpo |
| Hover fades | transition: all .3s (blog titles to 60%, footer links to 100%); language link 200ms; circle button 200ms cubic-bezier(0.645, 0.045, 0.355, 1) |
Do’s and don’ts
- Keep the page #111314 with white type and 1px solid white rules under section titles.
- Put the violet only in the hero glow, fading from #6F00FF into the canvas.
- Use the white-to-15% gradient fill on one key word or line per heading.
- Use the single white pill (#FFFFFF, #111314 text, 40px radius, 70px tall) for the main action.
- Keep image cards square-cornered and pair each service with a result metric at 60% white.
- Set paragraphs at 70% white and metrics or meta at 60%.
- Set typed input text to ink: the live inputs compute #333333, which is unreadable on the dark field.
- Fill buttons or text with violet, or add a second accent (the unused #00DEE2 and #DCF2F4).
- Replace the white rules with grey or dotted ones.
- Round image cards or add shadows to them.
- Use ink-faint (40%, contrast 3.8:1) for anything but 16px semibold labels like the inactive IT.
- Add letter spacing or uppercase headlines.
- Animate with long or bouncy moves; nothing travels more than 20px except the button roll.
Example prompt
Any page in the Bronx style
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Get All AccessUpgrade to All AccessHow to use the Bronx 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/bronx.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