Flags the v4.0 default ring width change (3px → 1px, use ring-3 for v3 behavior) and per-corner border-radius improvements.

Tailwind CSS Borders Skill

Complete reference for border-related utilities in Tailwind CSS v4.3.

Contents

• Border Width - border, border-x, border-y, border-t, border-r, border-b, border-l, logical border-s, border-e, border-bs, border-be (block-start/end since v4.2)
• Border Color - border-{color}, per-side border colors
• Border Style - border-solid, border-dashed, border-dotted, border-double
• Border Radius - rounded, rounded-t, rounded-r, rounded-b, rounded-l, rounded-tl, rounded-tr, rounded-bl, rounded-br, rounded-full
• Outline - outline, outline-{width}, outline-{color}, outline-offset
• Ring - ring, ring-{width}, ring-{color}, ring-offset, ring-offset-{color}
• Divide - divide-x, divide-y, divide-{color}, divide-{style}