Under dash Illuminatorcolor?

I have a 2008 scion TC and it does have the illuminator with the under the dash light bars which have the light bulbs that are blue along with the cupholders. I was wondering if anyone knew where I could purchase a different color besides blue or amber? I am really looking for a purple and also if anyone knows the size of those bulbs that the illuminator tube plugs into that would help me further my search.