If you saved a pattern you've colored-in with Rapid Resizer, to change it's coloring:

  1. Go to your saved designs here.
  2. Load the design you want to change the coloring of.
  3. You'll be taken to the resizing page. There you can click Customize then Color.

If you alter a colored design using other Rapid Resizer tools (crop, arc, Designer, etc.) you won't be able to re-color that. So try to finish the design's shape before coloring. If you need to change a colored design's shape, you can change the uncolored original, then use the Coloring page's Recolor button to copy the coloring from the saved coloring of the previous version.