✔️ outline CSS Style Property

outline: outline-width outline-style outline-color | initial | inherit;

• none, dotted, dashed, solid, double, groove, ridge, inset, outset, revert, revert-layer, unset, inherit, initial
• auto, currentcolor, transparent, invert
• thin, medium, thick

Units: px, em, rem, vw, vh, vmin, vmax