You'll need to find the .plist that's controlling the color of that font. It can be in three places - the theme or biteSMS. To check the theme, look in the folder var/stash/[Theme]/Bundles/biteSMS. If there is a file in there titled Info.plist, open it (with iFile) and edit the font color line.
Or, the .plist could be in the actual biteSMS folder or a biteSMS theme folder. The address of those folders is either var/mobile/Library/biteSMS or var/mobile/Library/biteThemes.
The key is you are looking for the biteSMS theme's Info.plist so you can modify the font color. Hopefully, you'll find it in one of these three locations...
Marilyn
Thank you both very much for your help, between the both of you I found what I needed. However when in the QR folder it's says message just like you said, it actually says it twice, I'm assuming one for out going, one incoming but the color code they have is red and the other green, which doesn't make sense because the message colors that are in the theme are white for outgoing and black for incoming- I tried changing them to the color I wanted but it had no effect-?