Pillow ImageEnhance Color(pil-co),Brightness(pil-br) ,
OpenCV xphoto WhiteBalancer SimpleWB(cv2-simple:swb) GrayworldWB(cv2-grayworld:gwb) LearningWB(cv2-learning).
+ denotes the mean of a and b, and _ indicates applying process b to the outcome of a.
custom-simple is my own implement version of SimpleWB.(some case install opencv-contrib-python is heavy for just simple-wb)
Hint:I like pil-co:1.25+swb or custom-swb(1).I'm using cv's wb as default.you can copy space and modify that