Theming | Chat SDK by Vercel

Chat SDK uses Tailwind for styling and shadcn/ui for components. Since most of the components used in the Chat SDK like buttons and inputs are built using shadcn/ui primitives, you can collectively customize the appearance of the components to follow the theme of your application by modifying the CSS variables in app/global.css.

Convention

You can use a simple background and foreground convention for colors. The background variable is used for the background color of the component and the foreground variable is used for the text color.

The background suffix is omitted when the variable is used for the background color of the component.

Given the following CSS variables:

--primary: 240 5.9% 10%;
--primary-foreground: 0 0% 98%;

The background color of the following component will be var(--primary) and the foreground color will be var(--primary-foreground).

<div className="bg-primary text-primary-foreground">Hello</div>

List of variables

Here's the list of variables available for customization:

app/globals.css

@layer base {
    :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%;
        --chart-1: 12 76% 61%;
        --chart-2: 173 58% 39%;
        --chart-3: 197 37% 24%;
        --chart-4: 43 74% 66%;
        --chart-5: 27 87% 67%;
        --radius: 0.5rem;
        --sidebar-background: 0 0% 98%;
        --sidebar-foreground: 240 5.3% 26.1%;
        --sidebar-primary: 240 5.9% 10%;
        --sidebar-primary-foreground: 0 0% 98%;
        --sidebar-accent: 240 4.8% 95.9%;
        --sidebar-accent-foreground: 240 5.9% 10%;
        --sidebar-border: 220 13% 91%;
        --sidebar-ring: 217.2 91.2% 59.8%;
    }
    .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%;
        --chart-1: 220 70% 50%;
        --chart-2: 160 60% 45%;
        --chart-3: 30 80% 55%;
        --chart-4: 280 65% 60%;
        --chart-5: 340 75% 55%;
        --sidebar-background: 240 5.9% 10%;
        --sidebar-foreground: 240 4.8% 95.9%;
        --sidebar-primary: 224.3 76.3% 48%;
        --sidebar-primary-foreground: 0 0% 100%;
        --sidebar-accent: 240 3.7% 15.9%;
        --sidebar-accent-foreground: 240 4.8% 95.9%;
        --sidebar-border: 240 3.7% 15.9%;
        --sidebar-ring: 217.2 91.2% 59.8%;
    }
}