While you are busy coloring your world, be thoughtful of your combinations of colors.
If any of your work is to be displayed on a non color device, please try to preview on a grayscale device. I just had a cover which I wanted to use, but its lettering in orange disappeared against a gray background when displayed on an e-ink reader.
If you study up a bit and create a class in the stylesheet for your desired color, then you can also create a clip, which will allow you to insert your color with just a right click. This is only worthwhile if you have a number to do.
These would be examples:
body {color:blue;}
h1 {color:#00ff00;}
h2 {color:rgb(255,0,0);}
.redtext {color:#ff0000}
You can find out more at:
http://www.w3schools.com/css/css_text.asp