Text colors automatically adapt to the original texts

[iSams123]

Hello, I'm not sure if this idea has been talked about. But in manga-image-translator repo from author: [zyddnys]. There is a nice feature that text colors remain consistent before and after translation. I think it would be cool for comic-translate to have such feature as well. The original idea is this may help reader know which dilogues belong to which characters. Right now, it seems we have to change the colour manually, which is kinda tedious.