Using a palette knife or gloves, put a bit of paint on the lid of each color so you can easily see what it is. Here I have them propped up in yogurt containers in an antique wooden Royal Crown Cola box. Don't have a drawer to lay them all out flat, so this works for me.
If the lids are black, put white acrylic paint on them first. After it's dry put the paint on. I used to hang them on a line by bending the bottom of the tube over a nylon cord as shown below - but that can get pretty heavy.