I'm adding a new tier of loaders, but the belt tier actually has a lot of belts of the same speed, so I made a lot of loaders to match it. Problem is that the icons all looked the same until I added a colored dot to diffrentiate them, but that still doesn't look all that good. Can I alter the base graphic of the icon to make it more disctinct?
Edit: Never mind. Just realized I can tint the base...

It's GNU GPLv3; this means "yes, as long as you retain the license and give everyone else the same right." I.e., your mod must bu GNU GPLv3 as well.