Border Width

Utilities for controlling the width and color of an element's borders.

Class	CSS Output
`border`	`border-style: var(--tw-border-style); border-width: 1px;`
`border-2`	`border-style: var(--tw-border-style); border-width: 2px;`
`border-4`	`border-style: var(--tw-border-style); border-width: 4px;`
`border-red-500`	`border-color: var(--color-red-500);`
`border-blue-600`	`border-color: var(--color-blue-600);`
`border-t-4`	`border-top-style: var(--tw-border-style); border-top-width: 4px;`
`border-x-2`	`border-inline-style: var(--tw-border-style); border-inline-width: 2px;`
`border-red-500/50`	`border-color: color-mix(in oklab, var(--color-red-500) 50%, transparent);`
`border-[3px]`	`border-style: var(--tw-border-style); border-width: 3px;`

Reference