Named color
color: red;
color: orange;
color: tan;
color: rebeccapurple;
Hexadecimal color
color: #090;
color: #009900;
color: #090a;
color: #009900aa;
rgb() Colors
color: rgb(34, 12, 64, 0.6);
color: rgba(34, 12, 64, 0.6);
color: rgb(34 12 64 / 0.6);
color: rgba(34 12 64 / 0.3);
color: rgb(34 12 64 / 60%);
color: rgba(34.6 12 64 / 30%);
HSL Colors
color: hsl(30, 100%, 50%, 0.6);
color: hsla(30, 100%, 50%, 0.6);
color: hsl(30 100% 50% / 0.6);
color: hsla(30 100% 50% / 0.6);
color: hsl(30 100% 50% / 60%);
color: hsla(30.2 100% 50% / 60%);
Other
color: inherit;
color: initial;
color: unset;
color: transparent;
color: currentcolor; /* keyword */