Allow advanced color units when specifing the color in the Color Theme Editor

Now we are supporting HEX RGB values: #f00, #ff0000, f00, ff0000. When you enter these values the editor automatically converts them to #FF0000.

Would be very nice to be able to add values like:

• transparent
• currentColor

Also we could have this values for color "red":

• RGB
  • rgb(255,0,0)
  • rgb(100%,0%,0%)
• RGBA
  • rgba(255,0,0,0.5)
  • rgba(100%, 0%, 0%, 0.5
• HSL
  • hsl(0, 100%, 50%)
• HSLA
  • hsla(0, 100%, 50%, 0.5)
• Extended color keywords
  • red
  • tomato
  • etc

See reference: http://www.w3.org/TR/css3-color/ for additional informations.

The previewer works without problems, the issue is that when the input loses it's focus, for the values specified above the input is converted to a RGB HEX value (like #BBBBBB, etc, depends on the value entered).
See step1 and step2.png for the input "hsl(0, 100%, 50%)"