I wish to change a colour in an image using Gimp, but the new colour in the image doesn't match the colour I choose through the colorize tool.
For example, if I try to change a colour to red, the preview the colour is more of a brown.
The image mode is (and always has been) RGB with an alpha channel, as opposed to indexed, which I see from several other posts is often the cause of similar issues.
What else could be causing this issue?
Note that in reality there image isn't just a solid colour, so I'm trying to find a solution that will seamlessly blend the red colour with the other parts off the image.