Uiverse Tailwind snippets were written for v3

About one in nine Uiverse components is Tailwind-only markup, written against Tailwind v3. The archive compiles their classes with v4 at build time (src/lib/tailwind.ts), which is mostly identical, except:

• Border colour. v3 defaulted to gray-200; v4 uses currentColor. The compiler input adds the v3 default back.
• Shadow, blur and radius scales shifted one step. v3’s shadow-sm is v4’s shadow-xs, rounded is rounded-sm, and so on. Old names still compile, just one size smaller.
• ring is 1px in v4 (3px in v3). Write ring-3 to get the old look.
• Gradients. bg-gradient-to-r still works; v4’s own name is bg-linear-to-r.

If a preview looks slightly off next to uiverse.io, it’s almost always one of these.

Source: tailwindcss.com