UV without texture help

**darthviper107, **I have heard a few people say to use a color swatch to map color to a UV. Do you have a screenshot on how that is done. I do not understand this. I have 60 blocks and they are 60 different colors which equals 120 draws calls, 60 for the meshes and 60 for the materials. How would I make this into 61 draw calls. Would I have a swatch with 60 colors and then for each block some how map the UV to the color. I cannot understand how this would be done.