I don't mind if you decide to color my personal pieces of Indie, Stilts, or Pepper that are solo (I have a lot of uncolored sketches) but I can't speak for my commissioners, so please ask them first for their permission before coloring their piece. If the art involves anyone else, since the character doesn't belong to me, I'd prefer those not be altered.
If you want to practice coloring, please stick to the solo pieces of Indie, Stilts or Pepper only, for the sake of respecting my commissioners.