UI Theme Reference

Configurable design token registry used by ui-best-practices rules. Every hardcoded value in the best practices MUST reference a token defined here. To customize: override values below or generate via /pwdev-uiux:theme create.

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How to Use

Rules in the ui-best-practices skill reference tokens as theme.<section>.<token>. When implementing, map these tokens to your stack:

Stack	Token format	File
shadcn-vue	hsl(var(--<token>))	src/assets/index.css
shadcn-react	hsl(var(--<token>))	src/app/globals.css
primevue	var(--p-<token>)	src/assets/theme.css
tailwind-only	Tailwind config theme.extend	tailwind.config.ts
custom	Any CSS variable scheme	project-specific

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1. Colors

1.1 Surfaces

Token	Light	Dark	Usage
--background	#F9FAFB · 210 20% 98%	#0A0F1A · 222 84% 5%	Page background
--foreground	#1D2939 · 220 26% 16%	#F0F4F8 · 210 40% 96%	Primary text
--card	#FFFFFF · 0 0% 100%	#111827 · 222 47% 11%	Card / surface background
--card-foreground	#1D2939 · 220 26% 16%	#F0F4F8 · 210 40% 96%	Text on cards
--popover	#FFFFFF · 0 0% 100%	#111827 · 222 47% 11%	Popover / dropdown bg
--popover-foreground	#1D2939 · 220 26% 16%	#F0F4F8 · 210 40% 96%	Text on popovers

1.2 Text Hierarchy

Token	Light	Dark	Usage
--foreground	#1D2939	#F0F4F8	Primary text, headings
--muted-foreground	#667085	#94A3B8	Secondary text, labels, placeholders

1.3 Interactive

Token	Light	Dark	Usage
--primary	brand color	brand color (adjusted)	Buttons, links, focus rings
--primary-foreground	#FFFFFF	#FFFFFF	Text on primary backgrounds
--secondary	#F1F5F9	#1E293B	Secondary buttons, subtle actions
--secondary-foreground	#1D2939	#F0F4F8	Text on secondary backgrounds
--accent	#F1F5F9	#1E293B	Hover highlights, active states
--accent-foreground	#1D2939	#F0F4F8	Text on accent backgrounds

1.4 Feedback

Token	Light	Dark	Usage
--success	#039855	#34D399	Positive states, confirmations
--success-foreground	#FFFFFF	#022C22	Text on success backgrounds
--warning	#F79009	#FBBF24	Alerts, caution states
--warning-foreground	#422006	#422006	Text on warning backgrounds
--destructive	#D92D20	#FCA5A5	Errors, delete actions
--destructive-foreground	#FFFFFF	#450A0A	Text on destructive backgrounds
--info	#2563EB	#60A5FA	Informational, tips
--info-foreground	#FFFFFF	#172554	Text on info backgrounds

1.5 Structure

Token	Light	Dark	Usage
--border	#EAECF0	#1E293B	Dividers, separators
--input	#D0D5DD	#334155	Input borders
--ring	primary	primary	Focus ring color
--muted	#F1F5F9	#1E293B	Muted backgrounds (badges, tags)

1.6 Reserved Semantic Colors

These colors carry universal meaning. Never repurpose them for decorative or categorical use:

Color	Meaning	Allowed usage
Green (--success)	Good / positive / complete	Success states, positive KPIs, completion
Orange (--warning)	Caution / attention needed	Warnings, pending actions, approaching limits
Red (--destructive)	Bad / error / danger	Errors, failures, destructive actions, negative KPIs

For categorical/chart colors, use the chart palette below.

1.7 Chart Palette

Dedicated colors for data visualization — independent from feedback semantics:

Token	Default	Usage
--chart-1	#2563EB	Primary data series
--chart-2	#7C3AED	Secondary data series
--chart-3	#0891B2	Tertiary data series
--chart-4	#C026D3	Fourth data series
--chart-5	#EA580C	Fifth data series
--chart-muted	#D1D5DB	De-emphasized / comparison series

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2. Typography

2.1 Font Stack

Token	Default	Fallbacks
--font-sans	Inter	system-ui, -apple-system, sans-serif
--font-mono	JetBrains Mono	ui-monospace, monospace

2.2 Type Scale

Progressive scale — adjacent levels must not skip more than one step:

Token	Size	Line Height	Weight	Usage
--text-xs	12px	16px	400	Footnotes, badges, captions (minimum allowed)
--text-sm	14px	20px	400	Default body text, form labels
--text-base	16px	24px	400	Emphasized body, card titles
--text-lg	18px	28px	500	Section headings
--text-xl	20px	28px	600	Page sub-titles
--text-2xl	24px	32px	600	Page titles
--text-3xl	30px	36px	700	Hero headings
--text-4xl	36px	40px	700	Display / marketing headings

Constraint: never jump more than 2 steps between adjacent text elements (e.g., text-3xl → text-sm is forbidden; use text-3xl → text-xl → text-base → text-sm).

2.3 Font Weight Scale

Token	Value	Usage
--font-normal	400	Body text
--font-medium	500	Labels, nav items
--font-semibold	600	Headings, emphasis
--font-bold	700	Hero, display text

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3. Spacing

Base unit: 4px. All spacing must be a multiple of 4.

Token	Value	Tailwind	Typical Usage
--space-0.5	2px	gap-0.5	Micro adjustments only
--space-1	4px	gap-1	Icon ↔ label gap
--space-1.5	6px	gap-1.5	Compact inline gap
--space-2	8px	gap-2	Internal gap, small padding
--space-3	12px	gap-3	Badge padding, compact lists
--space-4	16px	gap-4, p-4	Default card padding (min)
--space-5	20px	gap-5	Medium card padding
--space-6	24px	gap-6, p-6	Default card padding (max), section gaps
--space-8	32px	gap-8, p-8	Large section padding
--space-10	40px	gap-10	Page-level vertical spacing
--space-12	48px	gap-12	Major section dividers
--space-16	64px	gap-16	Page top/bottom margins

Card Padding Rule

Card context	Recommended padding
Compact (sidebar, list items)	--space-3 to --space-4 (12–16px)
Standard (content cards)	--space-4 to --space-6 (16–24px)
Featured / hero cards	--space-6 to --space-8 (24–32px)
Ceiling	Never exceed --space-8 (32px) in cards

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4. Sizing

4.1 Interactive Elements

Token	Value	Usage
--height-input	40px	Inputs, selects, single-line controls
--height-button	40px	All buttons (must match input height)
--height-button-sm	32px	Compact buttons (tables, toolbars)
--height-button-lg	48px	Hero CTAs, prominent actions
--min-touch-target	44px	Minimum tap area on touch devices (WCAG 2.5.8)

4.2 Content Width

Token	Value	Usage
--max-w-form	560px	Form containers (onboarding, settings)
--max-w-button	400px	Max button width in wide forms
--max-w-content	768px	Article/text-heavy content
--max-w-page	1280px	Page container

4.3 Textarea Height

Context	Rows	Approx Height
Short input (tagline, slug)	2	~56px
Medium input (description)	4–5	~112px
Long input (feedback, notes)	6–8	~168px

Always enable auto-resize to grow with content.

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5. Border Radius

Token	Value	Usage
--radius	8px (configurable)	Base radius — defines product personality
--radius-sm	calc(var(--radius) - 4px)	Badges, small elements
--radius-md	calc(var(--radius) - 2px)	Inputs, buttons
--radius-lg	var(--radius)	Cards, modals
--radius-xl	calc(var(--radius) + 4px)	Feature cards, large containers
--radius-full	9999px	Avatars, pills, tags

Personality Guide

Brand Style	--radius value
Modern / trendy	12px–16px
Neutral / corporate (safe default)	8px
Enterprise / dense	4px
Sharp / editorial	0px–2px

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6. Shadows

All shadows use #000000 with controlled opacity. No colored shadows.

Token	Value	Usage
--shadow-xs	0 1px 2px rgba(0,0,0,0.05)	Subtle lift (inputs, badges)
--shadow-sm	0 2px 4px rgba(0,0,0,0.06)	Cards at rest
--shadow-md	0 4px 16px rgba(0,0,0,0.08)	Elevated cards, dropdowns
--shadow-lg	0 8px 24px rgba(0,0,0,0.10)	Modals, popovers
--shadow-xl	0 16px 48px rgba(0,0,0,0.12)	Command palette, overlays

Constraints:

• Minimum opacity: 0.05 (below is invisible)
• Maximum opacity: 0.12 (above feels heavy)
• Never use colored shadows
• Never use gradients as shadow replacements

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7. Z-Index Scale

Managed scale to prevent z-index wars:

Token	Value	Usage
--z-base	0	Default stacking
--z-dropdown	10	Dropdowns, tooltips
--z-sticky	20	Sticky headers, fixed navs
--z-drawer	30	Side drawers, panels
--z-modal	40	Modals, dialogs
--z-popover	50	Popovers over modals
--z-toast	60	Toast notifications
--z-command	70	Command palette (Cmd+K)
--z-overlay	80	Full-screen overlays

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8. Breakpoints

Token	Value	Tailwind	Usage
--bp-sm	640px	sm:	Large phones landscape
--bp-md	768px	md:	Tablets
--bp-lg	1024px	lg:	Small laptops
--bp-xl	1280px	xl:	Desktops
--bp-2xl	1536px	2xl:	Large screens

Navigation Breakpoint Rules

Viewport	Max nav items	Menu style
< md	4 visible	Bottom bar or hamburger
md–lg	5–6 visible	Top bar or compact sidebar
≥ lg	Unlimited	Full sidebar

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9. Motion & Animation

Token	Value	Usage
--duration-instant	100ms	Hover color changes, opacity
--duration-fast	150ms	Button press, toggle switch
--duration-normal	200ms	Dropdown open, tooltip appear
--duration-slow	300ms	Drawer slide, modal enter
--duration-slower	500ms	Page transitions, skeleton fade
--ease-default	cubic-bezier(0.4, 0, 0.2, 1)	General purpose easing
--ease-in	cubic-bezier(0.4, 0, 1, 1)	Elements leaving the screen
--ease-out	cubic-bezier(0, 0, 0.2, 1)	Elements entering the screen

Constraint: always respect prefers-reduced-motion: reduce — disable or minimize all animations.

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10. Focus & Accessibility

Token	Value	Usage
--ring-width	2px	Focus ring thickness
--ring-offset	2px	Gap between element and focus ring
--ring-color	var(--ring)	Focus ring color (defaults to primary)

Contrast Requirements (WCAG AA)

Element Type	Minimum Ratio
Normal text (< 18px)	4.5:1
Large text (≥ 18px or ≥ 14px bold)	3:1
UI components (borders, icons)	3:1
Non-text contrast (graphs, charts)	3:1

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CSS Variable Template

Minimal starter for any project — copy and customize:

@layer base {
  :root {
    /* Surfaces */
    --background: 210 20% 98%;
    --foreground: 220 26% 16%;
    --card: 0 0% 100%;
    --card-foreground: 220 26% 16%;
    --popover: 0 0% 100%;
    --popover-foreground: 220 26% 16%;
    --muted: 210 40% 96%;
    --muted-foreground: 215 16% 47%;

    /* Interactive */
    --primary: 221 83% 53%;       /* ← your brand color */
    --primary-foreground: 0 0% 100%;
    --secondary: 210 40% 96%;
    --secondary-foreground: 220 26% 16%;
    --accent: 210 40% 96%;
    --accent-foreground: 220 26% 16%;

    /* Feedback */
    --destructive: 0 72% 51%;
    --destructive-foreground: 0 0% 100%;
    --success: 160 84% 39%;
    --success-foreground: 0 0% 100%;
    --warning: 32 95% 44%;
    --warning-foreground: 26 83% 14%;
    --info: 221 83% 53%;
    --info-foreground: 0 0% 100%;

    /* Structure */
    --border: 220 13% 91%;
    --input: 218 14% 86%;
    --ring: var(--primary);

    /* Geometry */
    --radius: 0.5rem;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.10);

    /* Motion */
    --duration-fast: 150ms;
    --duration-normal: 200ms;
    --duration-slow: 300ms;

    /* Focus */
    --ring-width: 2px;
    --ring-offset: 2px;
  }

  .dark {
    --background: 222 84% 5%;
    --foreground: 210 40% 96%;
    --card: 222 47% 11%;
    --card-foreground: 210 40% 96%;
    --popover: 222 47% 11%;
    --popover-foreground: 210 40% 96%;
    --muted: 217 33% 17%;
    --muted-foreground: 215 20% 65%;

    --primary: 217 91% 60%;
    --primary-foreground: 222 47% 11%;
    --secondary: 217 33% 17%;
    --secondary-foreground: 210 40% 96%;
    --accent: 217 33% 17%;
    --accent-foreground: 210 40% 96%;

    --destructive: 0 63% 31%;
    --destructive-foreground: 210 40% 98%;
    --success: 142 69% 58%;
    --success-foreground: 144 61% 10%;
    --warning: 48 96% 53%;
    --warning-foreground: 22 78% 10%;
    --info: 217 91% 60%;
    --info-foreground: 222 47% 11%;

    --border: 217 33% 17%;
    --input: 217 33% 17%;
    --ring: 224 76% 48%;

    --shadow-sm: 0 2px 4px rgba(0,0,0,0.20);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.25);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.30);
  }

  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
      animation-duration: 0.01ms !important;
      transition-duration: 0.01ms !important;
    }
  }
}

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Integration with Plugin Commands

Command	How it uses this reference
/pwdev-uiux:theme create	Generates a customized version of the CSS template above
/pwdev-uiux:theme validate	Checks all foreground/background pairs against contrast requirements
/pwdev-uiux:theme from-figma	Maps Figma variables to this token structure
/pwdev-uiux:scan	Audits existing UI against these tokens
/pwdev-uiux:push-to-figma tokens	Syncs these tokens to Figma variables