First, click the green flag to see the demo. The boxes are drag-able; don't be afraid to drag to compare! If you like this, that add the two scripts in the editor that say to add to backpack to your backpack. After that, add the two scripts and the custom block to your project. Run the custom block, replace the variables in the second script, and delete the custom block. There is only support for solid colors at the moment (make a new sprite rectangle, then use the color picker to fill the rectangle in). This supports and might even make possible 1s1s... projects.
IMPORTANT: THIS IS NOT VISUALLY PERFECT!!! This is good enough for scratch to detect that the color is the same, though. If anyone can fix this bug, then I will like one of their projects. DISCLAIMER: THIS USES A HACKED BLOCK. It changes two strings (%s) to color pickers (%c). If this is a problem, them type it in the comments and I will tell you how to use this without the hacked block. I learned to make hacked blocks from https://scratch.mit.edu/projects/24635061 (made by @nagi123 and @relrel) and from https://docs.google.com/spreadsheets/d/1uT1vHi6IUUaUix5y3k4p28p2No6pvLNKF_yrtrajEY4/edit#gid=0. CITATION: YOU MUST CITE @helloandgoodbye9 TO USE THIS!!! Please be a good scratch citizen and cite all your sources for a project, including this one. -------------------------------------------------------------------------------------------- While there are a few projects like this, I could not find one that would change the colors of costumes to match. So, I made this :-). Versions: v.1.1 Fixed Description and fixed variables. v.1.0 Released