flowmanceStartuk Design System
Startuk is a dark, clean SaaS landing page. It sits on a deep ink-blue canvas (#12141D) with big white Inter headlines, charcoal bands and cards a shade lighter, and small warm orange accents that pull the eye to the next action. A blue-to-magenta gradient appears in only two places, the testimonial panel and the footer, so it reads as a special moment rather than a theme.
Four signatures make it recognisable:
- Faces inside the headline. The hero line Develop [face] with speed [face] and style. puts cut-out portraits in solid coloured circles (green, royal blue) between the words, with a hand-drawn orange underline under style and an email capsule finishing the last line.
- The two-tone section title. Several section titles run two lines in headline-lg with the first line white and the second greyed (white at 50%): Empower your startup to / reach new heights. Others (Foster growth through user-centric approaches., Client success stories.) stay fully white.
- Orange underlined links. Secondary actions are sandy-orange text with an arrow and a 2px inset underline: Buy Template →, View on Designer →.
- Coral metrics. Big coral numbers (4k, $10m, 100%) at 80px over small grey labels.
Startuk is dark-only.
Colors
Surfaces
#12141DPage background (--black-3)
#1E2028Grey bands (.section.gray), the tab panel, media cards, the dark .button, fields (--black-4)
#252831Inactive tab pills
#2F313BTab pill hover
#1E2028Contact inputs
#FFFFFF · 17%With field: Contact inputs
#747474Input placeholder (--dim-grey)
#FFFFFFWhite circular slider arrows
Ink
#FFFFFFText on primary
#F2E7FCText on primary-hover
#FFFFFF#FFFFFFText on accent
#FFFFFFHeadlines, active nav link, button text
#FFFFFF · 50%Paragraphs (p and li default), inactive nav links, the grey second line of titles, footer links
#8F8F8FMetric labels, blog category text (--grey)
#E7E7E7.paragraph-white, the rare paragraph that needs to be brighter
#FFFFFF#12141DText on inverse-canvas
Action
#1E2028The .button pill (Schedule Demo)
#FF705A.button:hover
#3C5CCFContact form submit and the gradient start (--royal-blue)
#FD672CThe round arrow button, metrics, the active tab text (--coral)
#FF934EUnderlined text links (--sandy-brown)
#FF934E · 50%The 2px inset underline on those links
#FFF0E6Active tab pill background (--linen)
Lines & effects
#E12CFDGradient end (--magenta)
#FFFFFF · 15%1px horizontal rules between sections
#FFFFFF · 25%FAQ row top borders
Typography
Inter · display-hero
The quick brown fox jumpsHero h1 Develop with speed and style. 86px · 500 · 1.10 · -2px
Inter · headline-lg
The quick brown fox jumpsSection h2 titles, two lines, second line at 50%. 41px · 500 · 1.00 · -2px
Inter · title-lg
The quick brown fox jumpsTestimonial quote (.first-title, 70% opacity). 27px · 500 · 1.10
Inter · body-lg
The quick brown fox jumpsHero sub-line and lead paragraphs. 18px · 500 · 1.30
Inter · label-nav
The quick brown fox jumpsNav links. 17px · 600 · 1.18
Inter · caption
The quick brown fox jumpsLogo-strip line, blog categories. 15px · 500 · 1.30
Spacing & shape
| Purpose | Value |
|---|---|
| Container | max 1200px, centred (.container) |
| Section rhythm | plain sections pad 120px top and bottom; grey surface-1 bands pad 100px |
| Breakpoints | 991px, 767px and 479px, plus min-width steps at 768px and 1440px |
Spacing scale
| Token | Value | Preview |
|---|---|---|
xs | 10px | |
sm | 16px | |
md | 25px | |
lg | 50px | |
xl | 80px | |
2xl | 100px |
Layout spacing
| Token | Value | Preview |
|---|---|---|
panel-x | 60px | |
panel-y | 70px | |
section-band | 100px | |
section | 120px |
Border radius
Surfaces
How the surfaces stack, from the page background up. Hex codes and roles are in Colors above.
Motion
| Nav and footer link fade | opacity 0.5 → 0.95 (nav) or → 1 (footer), 300ms |
| Button hover | Background #1E2028 → #FF705A, transition: all 0.3s |
| Underline thicken | box-shadow inset 2px → 3px, 200ms cubic-bezier(0.645, 0.045, 0.355, 1) |
| Arrow nudge | x 0 → 6px on hover, back to 0, 500ms outQuint |
| Icon pop | scale 1 → 1.1 on hover, 100ms ease |
| Round button | Background colour, 200ms cubic-bezier(0.645, 0.045, 0.355, 1) |
| Tab pill | all 0.2s |
| Scroll fade-in | opacity 0 → 1, 1000ms outQuart, on scroll into view |
| Mouse parallax | Mouse-move interactions shift elements between ±4px and ±80px (500ms) |
Do’s and don’ts
- Use canvas #12141D for the page and alternate plain sections with surface-1 #1E2028 bands.
- Write section titles as two lines of headline-lg (41px, −2px), the second line at white 50%.
- Pair the dark button-primary pill with an orange underlined link-underline and a →.
- Keep paragraphs at white 50% (ink-muted) and 16px weight 500.
- Put product mockups in 12px surface-1 cards and let them run off the card edge.
- Use the blue-to-magenta gradient only for the testimonial panel and the footer.
- Add drop shadows or glass blur; depth is surface steps only.
- Fill big areas with coral #FD672C; it is for the round button, metrics and the active tab text.
- Use the hover colours (#FF705A with #F2E7FC text) for resting buttons; that pairing is low contrast, so keep the hover label at 16px weight 600 and short.
- Put coral text on the linen #FFF0E6 tab at small sizes beyond the 15px weight 600 tab label; the pair is low contrast.
- Use THICCCBOI or any second typeface, uppercase labels, or weights above 600 for headings.
- Round cards beyond 12px or buttons below 30px.
- Put text labels on the coral #FD672C circle; white on coral is low contrast, so it carries only the 22px → icon.
- Lighten the 50% white tab label on the #2F313B hover; it sits right at the contrast limit, so keep it at 15px weight 600.
Example prompt
Any page in the Startuk style
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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/startuk.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