In general, if we judge whether a given string is color type
Need to consider whether it is a 16-en-code code (such as #ffffff) or internal definition strings (such as ButtonFace, RED, Blue, etc.) or RGB () form
If we deliver its format in turn, we comply with the standard that will be quite spending time and code work.
I found a very simple and effective way in the app.
It is to create a character string that will be judged by document.createElement ().
Such as var ospan = document.createElement (" ");
Then judge whether ospan.style.color is empty, the string strcolor is an illegal color value otherwise legal
The following is example
