The border-block-start-color property sets the color of the logical block-start border side (depends on writing-mode/direction)..box {
border-block-start-color: navy;
}.box {
border-block-start: 2px dashed currentColor;
}currentColorCurrent color value (default).transparentFully transparent color.rgb()RGB color function.hsl()HSL color function.hwb()HWB color function.lab()CIE Lab color function.lch()CIE LCH color function.oklab()Oklab color function.oklch()Oklch color function.color()Generic color function for custom color spaces.light-dark()Selects between two color values per color-scheme.linear-gradient()Linear color gradient (as <image-1D>, new in L4).CSS Borders Module Level 4Working Draft<color>W3CMDNCSSShow all codeEdit CSS onlineThe plugin that remembers hundreds of CSS items for youEvery CSS property — in a live demonstrationThe bilingual CSS referencedefinitionexamplessyntaxmodulespecificationvalue typessourcesvisual demonstrationpreviousnext
