this is 4 blue, maybe even red or yellow.
When starting your gameboy, as the words "Game Boy" flash across the screen, you can change the colors of your game, but only temporarily. It won't stay like that forever. Anyway, here are the codes
Down= Pastel colors.
Down and B= Dark Autumn colors.
Down and A= More Autumny colors.
Right= Christmas colors.
Right and B= What's light will be dark, what's dark will be light. This is my personal fav.
Right and A= Green.
Up= Chocolaty colors.
Up and B= Really dark chocolaty colors<.BR> Up and A= Another shade of chocolate.
Left= I've got the bluuueees.
Left and B= Black and white, like you're playing Game Boy 1 or Game Boy pocket.
Left and A= A Cadet Blue
One of these makes the Rock Tunnel light, but I forgot which. You're going to have to experiment.this is 4 GAMEBOY COLOR ONLY
4 those who have seen this be4, i got this off of www.computerandvideogames.com.