Coloring

So, I have been thinking about this, but since I was a tad bit rushed on the design of the four most recent drawings I did, with me only having a day, do you guys believe I should go back and color them now since I have more time with the Challenge being on hold for them? Yes or no? You can look at my previously colored designs below to decide (don't whine about them being thumbs, don't be lazy and click on them if you can't see them that well):