Receives a hex string, and returns an array of R,G,B components

hex2rgb.coffee

# Filed under: hex, color, rgb
# Converts a hex string to RGB.

###
  @param a a "#xxxxxx" hex string,
###
hex2rgb = (a) ->
  ###
    turn it into a number by taking the hexadecimal prefix and the
    numerical portion, and if the #xxxxxx form is used replace each
    character with itself twice.
  ###
  a = +("0x" + a.slice(1).replace(a.length > 4 && /./g, '$&$&'))
  
  ###
    return an array with red, blue, and green components.
  ###
  [ a >> 16, a >> 8 & 255, a & 255 ]