Theming

Every component reads its colors, radius, and spacing from CSS variables. php artisan ui:init injects this block for you. If you copy components by hand (Channel B), paste this once into your Tailwind v4 stylesheet and you are done, no component edits.
Theme variables

/*
 * LaralCN-UI theme tokens. Tailwind v4, CSS-first.
 * These variables are consumed by components (bg-primary, text-muted-foreground,
 * rounded-md, ...). Edit the values to theme your project, do NOT edit component
 * files. Channel B users: copy this whole block into your app stylesheet once.
 */

:root {
    --background: 0 0% 100%;
    --foreground: 240 10% 3.9%;
    --card: 0 0% 100%;
    --card-foreground: 240 10% 3.9%;
    --popover: 0 0% 100%;
    --popover-foreground: 240 10% 3.9%;
    --primary: 240 5.9% 10%;
    --primary-foreground: 0 0% 98%;
    --secondary: 240 4.8% 95.9%;
    --secondary-foreground: 240 5.9% 10%;
    --muted: 240 4.8% 95.9%;
    --muted-foreground: 240 3.8% 46.1%;
    --accent: 240 4.8% 95.9%;
    --accent-foreground: 240 5.9% 10%;
    --destructive: 0 84.2% 60.2%;
    --destructive-foreground: 0 0% 98%;
    --border: 240 5.9% 90%;
    --input: 240 5.9% 90%;
    --ring: 240 10% 3.9%;
    --radius: 0.5rem;
}

.dark {
    --background: 240 10% 3.9%;
    --foreground: 0 0% 98%;
    --card: 240 10% 3.9%;
    --card-foreground: 0 0% 98%;
    --popover: 240 10% 3.9%;
    --popover-foreground: 0 0% 98%;
    --primary: 0 0% 98%;
    --primary-foreground: 240 5.9% 10%;
    --secondary: 240 3.7% 15.9%;
    --secondary-foreground: 0 0% 98%;
    --muted: 240 3.7% 15.9%;
    --muted-foreground: 240 5% 64.9%;
    --accent: 240 3.7% 15.9%;
    --accent-foreground: 0 0% 98%;
    --destructive: 0 62.8% 30.6%;
    --destructive-foreground: 0 0% 98%;
    --border: 240 3.7% 15.9%;
    --input: 240 3.7% 15.9%;
    --ring: 240 4.9% 83.9%;
}

@theme inline {
    --color-background: hsl(var(--background));
    --color-foreground: hsl(var(--foreground));
    --color-card: hsl(var(--card));
    --color-card-foreground: hsl(var(--card-foreground));
    --color-popover: hsl(var(--popover));
    --color-popover-foreground: hsl(var(--popover-foreground));
    --color-primary: hsl(var(--primary));
    --color-primary-foreground: hsl(var(--primary-foreground));
    --color-secondary: hsl(var(--secondary));
    --color-secondary-foreground: hsl(var(--secondary-foreground));
    --color-muted: hsl(var(--muted));
    --color-muted-foreground: hsl(var(--muted-foreground));
    --color-accent: hsl(var(--accent));
    --color-accent-foreground: hsl(var(--accent-foreground));
    --color-destructive: hsl(var(--destructive));
    --color-destructive-foreground: hsl(var(--destructive-foreground));
    --color-border: hsl(var(--border));
    --color-input: hsl(var(--input));
    --color-ring: hsl(var(--ring));
    --radius-lg: var(--radius);
    --radius-md: calc(var(--radius) - 2px);
    --radius-sm: calc(var(--radius) - 4px);
}