hex rgb color code hightlight

I would like for sublime to hightlight hex and rgb colors in the code with the corresponding color like the the following html/css example shows :)

<code>#ff0000</code>

code {color: #000, background-color: #ff0000}

the example is just to demonstrate what I mean what sublime should do ...

don't know if I explained it the way I mean it. goal is to let me see what colors look like while writing code :)