Deza Egg is a Japanese after market game hardware customizer. So if you're not happy with the 3DS colors Nintendo is offering, Deza Egg can help.
Deza Egg has sixty colors that users can choose from, and users can either send in their 3DS to be painted with prices starting at ¥19,980 (US$244) depending on the colors or buy a newly painted unit for ¥44,980 ($550) and up. That price includes the price of the actual 3DS unit.
I like the yellow one!