Another small website easy to use for creating 4-colors palettes: www.pixelfor.me

Can i change the alpha on a color without it Counts as a new color?

I am really questioning the use of any 4 custom colors.

A gameboy did have 4 colors, yes, but actually only 4 "grayscale" colors. (White, light gray, dark gray and black).

The only thing that made it "greenish" was the screen that tinted it.

Don't know why you all are just picking any 4 colors but I guess it's a matter of how authentic Gameboy you want it to be

EDIT: Appearently the rules doesn't apply to imitating the gameboy hardware. You can use any 4 colors at any time (even switching within the game). As long as there are only 4 colors on screen at the same time. :-/

FreneticGamez: Not if you aiming for a Gameboy game, no.

Will probably use this one but I might still change it a bit

We're producing all the artwork for ours in a greyscale (0%, 33%, 66% and 100%) palette that gets swapped out by a shader in-engine for our actual palette.

Haven't decided on the actual palette yet but it'll likely default to the olive green and then offer a couple of different options users can switch between.

Kinda like what I've done here for the title screen of another game. Just for funsies, kinda like whacking the game into a Super Gameboy style device or a GC Gameboy Player where you can choose palettes to overlay onto the original.