So, here’s a poor man’s version of color balance rgb as a CTL script. It only implements the main tab, and I’ve taken quite a few shortcuts regarding color space conversions, so it most definitely won’t work as the original. But maybe it could be a starting point if somebody wants to take it further.
The script depends on _artlib.ctl from the ART-ctlscripts repository, so in order to use it the easiest thing to do is to copy it in the same dir as the other scripts.
colorbalancergb.ctl (6.0 KB)
HTH