There is a really simple RGB to Hex converter that works really well. No more opening up Adobe Photoshop or Fireworks to simply get an RGB or Hex color converted. This link has been added to my Image Resources page so check it out if you need a very quick color conversion between RGB and Hex values.

It is a good idea to begin to convert your colors to RBG now that CSS3 provides an alpha transparency value for RBG colors. Here is an example of the difference in the CSS for a font color:

Old color method using Hex example: color: #8F0179;

RGB color method without transparency: color: rgb(143,1,122);

RGB color method with transparency: color: rgba(143,1,122,.5);

The last decimal value determines the alpha transparency for the color and can be any value up to 1. The value of 1 eliminates the entire transparency showing the full color.

The ability to use transparency is available in all browsers except Internet Explorer 8 or earlier and is considered a new CSS3 feature.