flowmanceCrex Design System
Crex is a quiet, spacious studio template with a gallery feel. A slim white sidebar is fixed down the left edge; the rest of the page is pale mint-cream with white panels set into it. Headlines are a light, high-contrast serif (Butler 300) at large sizes, introduced by a small Poppins line above. The only colour is a muted sage green (#597463) on pill buttons, card titles and a round back-to-top button.
The measured page is the template's intro page: a centred hero, then Landings, Portfolio and Inner Pages groups of preview cards. The page designs themselves appear inside those previews; their values here come from the shared CSS classes.
Four signatures make it recognisable:
- Fixed left sidebar. A 90px white column holds a round hamburger button at the top, the crex wordmark rotated −90° in the middle, and a round share button at the bottom. There is no top nav bar.
- Light serif over a small sans kicker. Hero and group titles are Butler at weight 300 (45–60px) with a Poppins 17px weight-500 line above it: Start by choosing one / Landings, You deserve a stunning website / Design Visually. Create Efficiently.
- Mint and white. Mint-cream #F2FAF5 bands hold white #FFFFFF panels and cards, packed with only 5px gaps. No borders or shadows separate them.
- Sage pills. Buttons are 30px-radius pills in Butler: one filled sage, one sage outline.
Colors
Surfaces
#FFFFFFSidebar, hero panel, preview cards, footer
#F2FAF5Mint-cream section band (--mint-cream)
Ink
#FFFFFFText on primary
#121217Titles, kickers, the logo, menu links
#111111Hamburger lines and sidebar icons
#515157Lead lines under titles
#616167Paragraphs (p base style)
#696975Dropdown links
#818187Footer credits
#FFFFFFAction
#597463Filled pill button, back-to-top circle, preview-card titles, blockquote fill (--teal)
#5B7464.button:hover background (both buttons)
#688673Text of the outline button
Lines & effects
#FFFFFF · 98%Full-screen menu background
#888888 · 3%Fill of the round sidebar buttons
#597463The 1px outline on both buttons
Typography
Butler · display-hero · shown in Playfair Display (fallback)
The quick brown fox jumpsDesign Visually. 60px · 300 · 1.0
Poppins · logo-lg
The quick brown fox jumpscrex in the footer. 50px · 600 · 1.0
Butler · headline-lg · shown in Playfair Display (fallback)
The quick brown fox jumpsGroup titles Landings, Portfolio, Inner Pages. 45px · 300 · 1.11
Butler · title-card · shown in Playfair Display (fallback)
The quick brown fox jumpsPreview-card titles Home I, Portfolio Grid, in sage. 25px · 300 · 1.0
Butler · body-lg · shown in Playfair Display (fallback)
The quick brown fox jumpsLead Create pixel-perfect website, fast & easy. 23px · 300 · 1.3
Poppins · eyebrow
The quick brown fox jumpsKickers above titles (.sub-title). 17px · 500 · 1.41
Spacing & shape
| Purpose | Value |
|---|---|
| Container | max 1200px |
| Breakpoints | 991px, 767px and 479px, plus a min-width: 768px set |
Spacing scale
| Token | Value | Preview |
|---|---|---|
xs | 5px | |
sm | 10px | |
md | 20px | |
lg | 40px | |
xl | 69px | |
2xl | 120px |
Layout spacing
| Token | Value | Preview |
|---|---|---|
card-gap | 5px | |
section-side | 68px | |
sidebar | 90px | |
section | 120px | |
hero | 165px |
Border radius
Surfaces
How the surfaces stack, from the page background up. Hex codes and roles are in Colors above.
Motion
| Scroll reveal | opacity 0 → 1 and y −10px → 0 over 300ms ease; larger blocks fade and move over 1000ms outQuart. |
| Card hover | Moves up 10px over 300ms ease, back to 0 on mouse out |
| Button hover | Background and text colour, transition: all 0.4s |
| Hamburger | Lines rotate and resize into a cross over 300ms inOutBack; the menu fades in over 300ms |
| Back-to-top | scale 0 → 1 over 300ms ease when scrolling down; scale 1 → 0 when scrolling up near the top |
| Dropdown | Opacity and a small move over 300ms on open and close |
Do’s and don’ts
- Keep the fixed 90px sidebar with the rotated crex wordmark instead of a top nav.
- Set titles in Butler 300 (45–60px, 0 tracking) with a Poppins 17px 500 kicker above.
- Put white #FFFFFF panels on the mint #F2FAF5 band and space cards only 5px apart.
- Use sage #597463 pills (30px radius, Butler 17px 500, padding 18px 43px 13px) for actions.
- Give paragraphs #616167 in Butler 16px 300 with line height 1.56.
- Keep the outline button's #688673 text at 17px weight 500; it is the template's real colour at 4.0:1 on white.
- Add shadows, borders or rounded corners to cards and images.
- Use uppercase or letter spacing on titles.
- Introduce a second accent; --blue #1C00FF in the CSS is unused.
- Use #818187 for paragraphs; it is for the footer credit and short meta at 16px+ only (3.6:1 on mint).
- Set Butler headlines heavier than 300.
- Use bounce easing anywhere except the hamburger's inOutBack.
Example prompt
Any page in the Crex style
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Get All AccessUpgrade to All AccessHow to use the Crex 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/crex.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