Dark green are 80 grit, dark blue 120 grit and Red 240 grit. Must emphasise this, do not press hard or they will disintegrate on you. Around 15 on the Dremel speed, do not use high speeds with them if you can help it.
Get the feel of them and after a while you’ll know how far you can push them without wearing them out quick or them breaking up, they are bloody brilliant bits of kit. So versatile, you’ll be wondering how you got by without them in a bit.