One datapoint: Color manipulation or color grading in film is mostly done using Blackmagic Davinci Resolve (runs under Linux, can also edit, mix sound etc, worth checking out).

Davinci is a nose based software as well (for the color part). The advantage is of course that you can easily copy graphs, parts of graphs or nodes from one picture to another. In a professional setting that means you can create one calibration node for your camera, one node to adjust differences between different pictures, one to use a certain look etc. You can combine masks from multiple nodes, do parallel color correction etc.