favourite colour of that translucent plastic you can kinda see the electronics through?
The obvious answer is, of course, Atomic Purple, a colour so iconic that whenever I see anything remotely similar to it like my current inexpensive emulator handheld of choice, I am given an intense nostalgia for the Game Boy Colour. Unfortunately, my own atomic purple GBC has been lost to the ravages of time, and I'm definitely not interested in paying the current market prices for a good condition one, so the RG35xx will just have to suffice.