support deg unit in HSL values

autoload/css_color.vim

@@ -231,7 +231,7 @@ let s:_hexcolor   = '#\(\x\{3}\%(\>\|\x\{3}\>\)\)' " submatch 1
 let s:_rgbacolor  = '#\(\x\{3}\%(\>\|\x\%(\>\|\x\{2}\%(\>\|\x\{2}\>\)\)\)\)' " submatch 1
 let s:_funcname   = '\(rgb\|hsl\)a\?' " submatch 2
 let s:_ws_        = '\s*'
-let s:_numval     = s:_ws_ . '\(\d\{1,3}%\?\)' " submatch 3,4,5
+let s:_numval     = s:_ws_ . '\(\d\{1,3}\%(%\|deg\)\?\)' " submatch 3,4,5
 let s:_listsep    = s:_ws_ . ','
 let s:_otherargs_ = '\%(,[^)]*\)\?'
 let s:_funcexpr   = s:_funcname . '[(]' . s:_numval . s:_listsep . s:_numval . s:_listsep . s:_numval . s:_ws_ . s:_otherargs_ . '[)]'