csscolor
"#"
hexdigit
hexdigit
hexdigit
hexdigit
hexdigit
hexdigit
"#"
hexdigit
hexdigit
hexdigit
"rgb"
_
"("
_
colnum
_
","
_
colnum
_
","
_
colnum
_
")"
"hsl"
_
"("
_
colnum
_
","
_
colnum
_
","
_
colnum
_
")"
"rgba"
_
"("
_
colnum
_
","
_
colnum
_
","
_
colnum
_
","
_
decimal
_
")"
"hsla"
_
"("
_
colnum
_
","
_
colnum
_
","
_
colnum
_
","
_
decimal
_
")"
hexdigit
/[a-fA-F0-9]/
colnum
int
percentage