You either adjust the HUE, SAT & LUM
OR the RED, GREEN & BLUE.
One set will adjust the other so you may not be able to get exactly the same values in both that you see in Gimp.
You will have to choose which looks best.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11