I have a picture where it is black, grey and white. I can change the color by going to image > adjustments > HUE
By doing that I got a little window where I can actually change lots of things
But it doesn't give me a true RGB value as I don't want any red and green in my color. It only display things from -100 to +100.
It is important to note that GIMP actually lets you do that fairly simply with the tool "colorify" in true RGB. I am utterly surprised photoshop doesn't propose that.
How can I do that?