The jQuery.fx.parseColor function can't process 6-character-long color strings, because it always recognizes the string as a 3-character-long color value. A solution could be to check for the longer format first and then move on to the shorter one, or alternatively, the regular expression for the short format could be corrected.

Whichever the case, there's also a syntax error in the function. The 'color' parameter is used as 'c' in line 373.