Play with the 'Weapon' value to load a color.
Using the Color Replace FX and ImageManipulator, I've made a color swap using a palette file. (Image)
The number of lines of events for the palette is the number of colors the sprite has x3. Example: MegaMan has 7 colors (including his outline color). Each color has RGB. You'd have to change each R, G, and B in each color. Thus 7x3=21, or 21 lines of events.
It reads the RGB from the image file loaded from ImageMul. It's R, G, B at the image X,Y coords.
The palette file is a image that is 7 x 3. The Color Value (which color to load) is Y and X is each color on that line. Think of it as a sort of array.
"CLR1" is the black darkest blue of MegaMan's outer armor. "Color" is the name of the ImageManipulator.