Just a possibility, the gmic plugin http://www.gmic.eu has an interactive colouring tool. https://i.imgur.com/v0VfxhG.jpg
On one hand easy to use, on the other hand, does need practice to get the best results. (I need more practice, missed more than a few spots) https://i.imgur.com/yFAHIeP.jpg
edit:
On one hand easy to use, on the other hand, does need practice to get the best results. (I need more practice, missed more than a few spots) https://i.imgur.com/yFAHIeP.jpg
edit:
Quote: Don't know what I'll do about the patterned dress.Ohhh.. I see what you mean. No easy way to apply a pattern fill to conform to a body shape.