Per http://www.w3.org/TR/html5/number-state.html#color-state, if no value is specified, then the value should be #000000. Current value is empty string.
var el = document.createElement("input");
Chrome 11: ""
Opera 11: "#000000"
FF4/IE9 not implemented
As per http://www.w3schools.com/html5/html5_form_input_types.asp, these new input types are not yet implemented. Will discuss in IRC regarding what is the current plan & if any one is working on this & then will update the same here.
*** This bug has been marked as a duplicate of bug 61273 ***