Whenever i try to make a custom backround for the main menu and run starcraft th colors are all messed up.

I don't know if their is a palette that the menu use, does anyone know why it does that?

The colors of the background or the colors or the stacraft interface GUIs?

Anyway, the background should have the same pallete of the .pcx that has the original background (I'm wondering if it's actually a pcx but it should be)
And the GUIs do have an especific pallete for them, for each of them if I recall correctly, just like cursor has different palletes when it's over an SMK, when it's on the background or when it's on the game selection box (between SC Vanilla and SC Broodwar) I, obviously, don't remember the pallete names but I'm pretty sure that you'll be able to find them now that you know they exist. I'll try to look up for them and post what you need to edit but you might as well start out by yourself.

Use 8-bit PCX. The palette for the screen is actually loaded from the background pcx.

thanks