Color Picker studio
This fancy tool will allow you to pick your own colors for your code highlighter. To use it you select the radio button behind the color you want change. Then you click on the colorful bit below and the script will be updated with those color values and it will be shown in those colors as well. When satified you can copy the script and your own color-set will be the default. Trigger it with highlightCode('id of div') without specification of color.
The nice color picker is from johndyer.name. If you want to use it remember that the file names have capitals and the example uses lower case file names. On local host it will work just fine like that.