name

transparent transparent

currentColor

3 hex

6 hex

4 hex

transparent 4 hex transparent

8 hex

transparent 8 hex transparent

rgb

rgb with alpha value

rgb whitespace syntax (0-1)

rgb whitespace syntax (0%-100%)

rgba

rgba whitespace syntax (0-1)

rgba whitespace syntax (0%-100%)

transparent rgb transparent

transparent rgba transparent

hsl

hsla

transparent hsl transparent

transparent hsla transparent

CSS4

gray()

hwb()

lab()

lch()

color()

device-cmyk()