[header] How to swap a sprite's color palette [title] Look at your sprite's current colours. [step] Open it up in an image editing program. [title] Notice that the sprite is only made up of so many colours, use the " pick colour " (or whatever its equivalent is) to pick out the darkest colour. 
[title] Draw a single block (5 x 5 pixels should be large enough) in that colour. [title] Select the next darkest colour and put another 5 x 5 block of that colour next to the first.