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Crimson Terminal

Crimson Terminal is a red shadcn/ui theme with sharp corners and monospace typography, in light and dark modes.

RedBrutalistSharp cornersMonospace
Sans
JetBrains Mono
Serif
System
Mono
JetBrains Mono
Radius
0rem
Open in editor
Create project
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Visitors
January – June
+12.5%
Buttons
Typography
The theme's three font families.
Sans · JetBrains Mono
The quick brown fox
Serif · System
jumps over the lazy dog.
Mono · JetBrains Mono
npx shadcn add button
Account
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
Team
Invite your teammates to collaborate.
SDJLINWK
OwnerEditorViewerSuspended
Storage7.2 of 10 GB
Volume64%
Invoices
InvoiceStatusAmount
INV001Paid$250.00
INV002Pending$150.00
INV003Unpaid$350.00
INV004Paid$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.

:root {
  --background: oklch(0.9079 0 0);
  --foreground: oklch(0.1579 0 0);
  --card: oklch(0.8845 0 0);
  --card-foreground: oklch(0.1579 0 0);
  --popover: oklch(0.8845 0 0);
  --popover-foreground: oklch(0.1579 0 0);
  --primary: oklch(0.4463 0.1678 27.48);
  --primary-foreground: oklch(1 0 0);
  --secondary: oklch(0.3705 0 0);
  --secondary-foreground: oklch(0.9619 0 0);
  --muted: oklch(0.8452 0 0);
  --muted-foreground: oklch(0.4184 0 0);
  --accent: oklch(0.476 0.159 25.64);
  --accent-foreground: oklch(1 0 0);
  --destructive: oklch(0.405 0.1551 27.81);
  --destructive-foreground: oklch(1 0 0);
  --border: oklch(0.2156 0 0);
  --input: oklch(0.861 0 0);
  --ring: oklch(0.4463 0.1678 27.48);
  --chart-1: oklch(0.4854 0.178 27.04);
  --chart-2: oklch(0.3211 0 0);
  --chart-3: oklch(0.5103 0 0);
  --chart-4: oklch(0.3489 0.123 26.41);
  --chart-5: oklch(0.2156 0 0);
  --sidebar: oklch(0.8845 0 0);
  --sidebar-foreground: oklch(0.1579 0 0);
  --sidebar-primary: oklch(0.4463 0.1678 27.48);
  --sidebar-primary-foreground: oklch(1 0 0);
  --sidebar-accent: oklch(0.8054 0 0);
  --sidebar-accent-foreground: oklch(0.4463 0.1678 27.48);
  --sidebar-border: oklch(0.3211 0 0);
  --sidebar-ring: oklch(0.4463 0.1678 27.48);
  --font-sans: JetBrains Mono, monospace;
  --font-serif: Courier New, Courier, monospace;
  --font-mono: JetBrains Mono, monospace;
  --radius: 0rem;
  --spacing: 0.25rem;
  --tracking-normal: -0.01em;
  --shadow-color: oklch(0 0 0);
  --shadow-opacity: 1;
  --shadow-blur: 0px;
  --shadow-spread: 0px;
  --shadow-offset-x: 3px;
  --shadow-offset-y: 3px;
  --shadow-2xs: 3px 3px 0px 0px hsl(0 0% 0% / 0.50);
  --shadow-xs: 3px 3px 0px 0px hsl(0 0% 0% / 0.50);
  --shadow-sm: 3px 3px 0px 0px hsl(0 0% 0% / 1.00), 3px 1px 2px -1px hsl(0 0% 0% / 1.00);
  --shadow: 3px 3px 0px 0px hsl(0 0% 0% / 1.00), 3px 1px 2px -1px hsl(0 0% 0% / 1.00);
  --shadow-md: 3px 3px 0px 0px hsl(0 0% 0% / 1.00), 3px 2px 4px -1px hsl(0 0% 0% / 1.00);
  --shadow-lg: 3px 3px 0px 0px hsl(0 0% 0% / 1.00), 3px 4px 6px -1px hsl(0 0% 0% / 1.00);
  --shadow-xl: 3px 3px 0px 0px hsl(0 0% 0% / 1.00), 3px 8px 10px -1px hsl(0 0% 0% / 1.00);
  --shadow-2xl: 3px 3px 0px 0px hsl(0 0% 0% / 2.50);
}

.dark {
  --background: oklch(0.1157 0 0);
  --foreground: oklch(0.9389 0 0);
  --card: oklch(0.1579 0 0);
  --card-foreground: oklch(0.9389 0 0);
  --popover: oklch(0.1579 0 0);
  --popover-foreground: oklch(0.9389 0 0);
  --primary: oklch(0.5164 0.2011 28.14);
  --primary-foreground: oklch(1 0 0);
  --secondary: oklch(0.2376 0 0);
  --secondary-foreground: oklch(0.9234 0 0);
  --muted: oklch(0.2156 0 0);
  --muted-foreground: oklch(0.5982 0 0);
  --accent: oklch(0.3956 0.142 26.69);
  --accent-foreground: oklch(1 0 0);
  --destructive: oklch(0.3658 0.1447 28.45);
  --destructive-foreground: oklch(1 0 0);
  --border: oklch(0.3705 0 0);
  --input: oklch(0.193 0 0);
  --ring: oklch(0.5164 0.2011 28.14);
  --chart-1: oklch(0.5164 0.2011 28.14);
  --chart-2: oklch(0.4649 0 0);
  --chart-3: oklch(0.6409 0 0);
  --chart-4: oklch(0.405 0.1551 27.81);
  --chart-5: oklch(0.2697 0 0);
  --sidebar: oklch(0.1457 0 0);
  --sidebar-foreground: oklch(0.8845 0 0);
  --sidebar-primary: oklch(0.5164 0.2011 28.14);
  --sidebar-primary-foreground: oklch(1 0 0);
  --sidebar-accent: oklch(0.2156 0 0);
  --sidebar-accent-foreground: oklch(0.5875 0.2303 28.26);
  --sidebar-border: oklch(0.3211 0 0);
  --sidebar-ring: oklch(0.5164 0.2011 28.14);
  --font-sans: JetBrains Mono, monospace;
  --font-serif: Courier New, Courier, monospace;
  --font-mono: JetBrains Mono, monospace;
  --radius: 0rem;
  --spacing: 0.25rem;
  --tracking-normal: -0.01em;
  --shadow-color: oklch(0 0 0);
  --shadow-opacity: 1;
  --shadow-blur: 0px;
  --shadow-spread: 1px;
  --shadow-offset-x: 5px;
  --shadow-offset-y: 5px;
  --shadow-2xs: 5px 5px 0px 1px hsl(0 0% 0% / 0.50);
  --shadow-xs: 5px 5px 0px 1px hsl(0 0% 0% / 0.50);
  --shadow-sm: 5px 5px 0px 1px hsl(0 0% 0% / 1.00), 5px 1px 2px 0px hsl(0 0% 0% / 1.00);
  --shadow: 5px 5px 0px 1px hsl(0 0% 0% / 1.00), 5px 1px 2px 0px hsl(0 0% 0% / 1.00);
  --shadow-md: 5px 5px 0px 1px hsl(0 0% 0% / 1.00), 5px 2px 4px 0px hsl(0 0% 0% / 1.00);
  --shadow-lg: 5px 5px 0px 1px hsl(0 0% 0% / 1.00), 5px 4px 6px 0px hsl(0 0% 0% / 1.00);
  --shadow-xl: 5px 5px 0px 1px hsl(0 0% 0% / 1.00), 5px 8px 10px 0px hsl(0 0% 0% / 1.00);
  --shadow-2xl: 5px 5px 0px 1px hsl(0 0% 0% / 2.50);
}

@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);
  }
}

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