The GameBoys come in various colours... who here has one? I have a transparent purple GBC and a translucent dusky pink GBA.
I really wanted an orange GBA, though, but as yet they're only available in Japan. Apparently, because the GameCube comes in either purple, black or orange, each Cube colour will have a GBA little brother in the same colour.
Here are some articles on the GameCube-coloured GBAs. The orangle and black ones are Japan-exclusive, although if you're really desperate, the articles contain links to somewhere where you can buy one for $100! The purple GBA is on sale in the US, labelled as 'indigo'.
orange GBA
black GBA