Underdark

Underdark is a neutral shadcn/ui theme with rounded corners and sans-serif typography, in light and dark modes.

Neutral Minimal Monochrome Rounded

Sans: System
Serif: System
Mono: System
Radius: 0.625rem

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Name

Framework

Notes

Visitors

January – June

+12.5%

Buttons

Typography

The theme's three font families.

Sans · System

The quick brown fox

Serif · System

jumps over the lazy dog.

Mono · System

npx shadcn add button

Account

Accept terms and conditions

Notifications

Choose what you want to hear about.

Product updates

New features and releases

Security alerts

Sign-ins from new devices

Marketing

Tips, offers and news

Payment method

CardPayPalApple Pay

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Team

Invite your teammates to collaborate.

SDJLINWK

OwnerEditorViewerSuspended

Storage7.2 of 10 GB

Volume64%

Invoices

Invoice	Status	Amount
INV001	Paid	$250.00
INV002	Pending	$150.00
INV003	Unpaid	$350.00
INV004	Paid	$450.00

FAQ

Yes. It adheres to the WAI-ARIA design pattern.

Colors

Click any swatch to copy its OKLCH value.

Base

Brand

Lines

Charts

Sidebar

StatusOptional, generated to match

Use this theme

Install it with the shadcn CLI, paste the CSS, or export tokens for your design tool.

Paste into app/globals.css, replacing the existing :root and .dark blocks.

Include success, warning & info colors

:root {
  --background: oklch(1 0 0);
  --foreground: oklch(0.145 0 0);
  --card: oklch(1 0 0);
  --card-foreground: oklch(0.145 0 0);
  --popover: oklch(1 0 0);
  --popover-foreground: oklch(0.145 0 0);
  --primary: oklch(0.205 0 0);
  --primary-foreground: oklch(0.985 0 0);
  --secondary: oklch(0.97 0 0);
  --secondary-foreground: oklch(0.205 0 0);
  --muted: oklch(0.97 0 0);
  --muted-foreground: oklch(0.556 0 0);
  --accent: oklch(0.97 0 0);
  --accent-foreground: oklch(0.205 0 0);
  --destructive: oklch(0.577 0.245 27.33);
  --destructive-foreground: oklch(0.985 0 0);
  --border: oklch(0.922 0 0);
  --input: oklch(0.922 0 0);
  --ring: oklch(0.708 0 0);
  --chart-1: oklch(0.646 0.222 41.12);
  --chart-2: oklch(0.6 0.118 184.7);
  --chart-3: oklch(0.398 0.07 227.39);
  --chart-4: oklch(0.828 0.189 84.43);
  --chart-5: oklch(0.769 0.188 70.08);
  --sidebar: oklch(0.985 0 0);
  --sidebar-foreground: oklch(0.145 0 0);
  --sidebar-primary: oklch(0.205 0 0);
  --sidebar-primary-foreground: oklch(0.985 0 0);
  --sidebar-accent: oklch(0.97 0 0);
  --sidebar-accent-foreground: oklch(0.205 0 0);
  --sidebar-border: oklch(0.922 0 0);
  --sidebar-ring: oklch(0.708 0 0);
  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
  --font-serif: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --radius: 0.625rem;
  --spacing: 0.25rem;
  --tracking-normal: 0em;
  --shadow-color: oklch(0 0 0);
  --shadow-opacity: 0.1;
  --shadow-blur: 3px;
  --shadow-spread: 0px;
  --shadow-offset-x: 0px;
  --shadow-offset-y: 1px;
  --shadow-2xs: 0px 1px 3px 0px hsl(0 0% 0% / 0.05);
  --shadow-xs: 0px 1px 3px 0px hsl(0 0% 0% / 0.05);
  --shadow-sm: 0px 1px 3px 0px hsl(0 0% 0% / 0.10), 0px 1px 2px -1px hsl(0 0% 0% / 0.10);
  --shadow: 0px 1px 3px 0px hsl(0 0% 0% / 0.10), 0px 1px 2px -1px hsl(0 0% 0% / 0.10);
  --shadow-md: 0px 1px 3px 0px hsl(0 0% 0% / 0.10), 0px 2px 4px -1px hsl(0 0% 0% / 0.10);
  --shadow-lg: 0px 1px 3px 0px hsl(0 0% 0% / 0.10), 0px 4px 6px -1px hsl(0 0% 0% / 0.10);
  --shadow-xl: 0px 1px 3px 0px hsl(0 0% 0% / 0.10), 0px 8px 10px -1px hsl(0 0% 0% / 0.10);
  --shadow-2xl: 0px 1px 3px 0px hsl(0 0% 0% / 0.25);
}

.dark {
  --background: oklch(0.145 0 0);
  --foreground: oklch(0.719 0.166 296.27);
  --card: oklch(0.145 0 0);
  --card-foreground: oklch(0.683 0 0);
  --popover: oklch(0.178 0 0);
  --popover-foreground: oklch(0.741 0 0);
  --primary: oklch(0.532 0.181 258.27);
  --primary-foreground: oklch(1 0 0);
  --secondary: oklch(0.321 0 0);
  --secondary-foreground: oklch(0.855 0 0);
  --muted: oklch(0.145 0 0);
  --muted-foreground: oklch(0.709 0.037 238.96);
  --accent: oklch(0.178 0 0);
  --accent-foreground: oklch(1 0 0);
  --destructive: oklch(0.662 0.226 33.05);
  --destructive-foreground: oklch(1 0 0);
  --border: oklch(0.321 0 0);
  --input: oklch(0 0 0);
  --ring: oklch(0 0 0 / 0);
  --chart-1: oklch(0.625 0.205 256.02);
  --chart-2: oklch(0.872 0.256 147.43);
  --chart-3: oklch(0.926 0.133 97.28);
  --chart-4: oklch(0.702 0.322 328.35);
  --chart-5: oklch(0.649 0.237 26.97);
  --sidebar: oklch(0.145 0 0);
  --sidebar-foreground: oklch(0.683 0 0);
  --sidebar-primary: oklch(0.63 0.203 254.36);
  --sidebar-primary-foreground: oklch(1 0 0);
  --sidebar-accent: oklch(0 0 0 / 0);
  --sidebar-accent-foreground: oklch(1 0 0);
  --sidebar-border: oklch(0 0 0 / 0);
  --sidebar-ring: oklch(0.63 0.203 254.36 / 0.17);
  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
  --font-serif: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --radius: 0.625rem;
  --spacing: 0.25rem;
  --tracking-normal: 0em;
  --shadow-color: oklch(0 0 0);
  --shadow-opacity: 0.1;
  --shadow-blur: 3px;
  --shadow-spread: 0px;
  --shadow-offset-x: 0px;
  --shadow-offset-y: 1px;
  --shadow-2xs: 0px 1px 3px 0px hsl(0 0% 0% / 0.05);
  --shadow-xs: 0px 1px 3px 0px hsl(0 0% 0% / 0.05);
  --shadow-sm: 0px 1px 3px 0px hsl(0 0% 0% / 0.10), 0px 1px 2px -1px hsl(0 0% 0% / 0.10);
  --shadow: 0px 1px 3px 0px hsl(0 0% 0% / 0.10), 0px 1px 2px -1px hsl(0 0% 0% / 0.10);
  --shadow-md: 0px 1px 3px 0px hsl(0 0% 0% / 0.10), 0px 2px 4px -1px hsl(0 0% 0% / 0.10);
  --shadow-lg: 0px 1px 3px 0px hsl(0 0% 0% / 0.10), 0px 4px 6px -1px hsl(0 0% 0% / 0.10);
  --shadow-xl: 0px 1px 3px 0px hsl(0 0% 0% / 0.10), 0px 8px 10px -1px hsl(0 0% 0% / 0.10);
  --shadow-2xl: 0px 1px 3px 0px hsl(0 0% 0% / 0.25);
}

@theme inline {
  --color-background: var(--background);
  --color-foreground: var(--foreground);
  --color-card: var(--card);
  --color-card-foreground: var(--card-foreground);
  --color-popover: var(--popover);
  --color-popover-foreground: var(--popover-foreground);
  --color-primary: var(--primary);
  --color-primary-foreground: var(--primary-foreground);
  --color-secondary: var(--secondary);
  --color-secondary-foreground: var(--secondary-foreground);
  --color-muted: var(--muted);
  --color-muted-foreground: var(--muted-foreground);
  --color-accent: var(--accent);
  --color-accent-foreground: var(--accent-foreground);
  --color-destructive: var(--destructive);
  --color-destructive-foreground: var(--destructive-foreground);
  --color-border: var(--border);
  --color-input: var(--input);
  --color-ring: var(--ring);
  --color-chart-1: var(--chart-1);
  --color-chart-2: var(--chart-2);
  --color-chart-3: var(--chart-3);
  --color-chart-4: var(--chart-4);
  --color-chart-5: var(--chart-5);
  --color-sidebar: var(--sidebar);
  --color-sidebar-foreground: var(--sidebar-foreground);
  --color-sidebar-primary: var(--sidebar-primary);
  --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
  --color-sidebar-accent: var(--sidebar-accent);
  --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
  --color-sidebar-border: var(--sidebar-border);
  --color-sidebar-ring: var(--sidebar-ring);

  --font-sans: var(--font-sans);
  --font-mono: var(--font-mono);
  --font-serif: var(--font-serif);

  --radius-sm: calc(var(--radius) - 4px);
  --radius-md: calc(var(--radius) - 2px);
  --radius-lg: var(--radius);
  --radius-xl: calc(var(--radius) + 4px);

  --shadow-2xs: var(--shadow-2xs);
  --shadow-xs: var(--shadow-xs);
  --shadow-sm: var(--shadow-sm);
  --shadow: var(--shadow);
  --shadow-md: var(--shadow-md);
  --shadow-lg: var(--shadow-lg);
  --shadow-xl: var(--shadow-xl);
  --shadow-2xl: var(--shadow-2xl);

  --tracking-tighter: calc(var(--tracking-normal) - 0.05em);
  --tracking-tight: calc(var(--tracking-normal) - 0.025em);
  --tracking-normal: var(--tracking-normal);
  --tracking-wide: calc(var(--tracking-normal) + 0.025em);
  --tracking-wider: calc(var(--tracking-normal) + 0.05em);
  --tracking-widest: calc(var(--tracking-normal) + 0.1em);
}

@layer base {
  body {
    letter-spacing: var(--tracking-normal);
  }
}