I am attempting to add a semitransparent layer of color to a black and white image in Gimp 2.8.0. I have added a new layer, clicked the bucket fill tool, selected the foreground color i want to add and adjusted opacity level. But, when I click in the B&W image to fill it, instead of the foreground color I selected (red) I get gray. Am I missing a step or am not using the correct process?

1 Answer 1


Likely because your image is in grayscale mode (see the window title bar). To use colors freely it has to be in RGB mode (Image>Mode>RGB)

  • thank you so much for that. somehow the program toggles greyscale mode on at random when i open images in it, and i never knew that was the problem till i looked at the window header Sep 19, 2020 at 15:06

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