Dark Mode UI Components for SaaS: Button, Input, Card, Badge (Tailwind CSS v4)
Dark Mode UI Components for SaaS: Button, Input, Card, Badge (Tailwind CSS v4) Every SaaS needs a solid component set. Dark mode is not optional anymore — users expect it, especially developer-facing products. This post covers the four components you will use in every SaaS dashboard: Button, Input, Card, and Badge. All built with Tailwind CSS v4 and designed to support both light and dark mode with a single class toggle. These are the exact components shipped in LaunchKit , the Next.js 16 SaaS starter kit. Setup: Dark Mode in Tailwind v4 Tailwind v4 changes how dark mode works. Instead of the darkMode: 'class' config entry, you use a CSS-first approach. In your global CSS: @import "tailwindcss" ; @custom-variant dark ( & : where (. dark , . dark * )); Then on your root <html> element, toggle the dark class. In Next.js with next-themes : // app/layout.tsx import { ThemeProvider } from ' next-themes ' ; export default function RootLayout ({ children }: { children : React . ReactNode }) {
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