Change one colour to another?
Problem
In GIMP, I have a green button GIF image: it shades from dark green to light green, against a transparent background. I would like to change it to blue, and keep the shading, so it shades from dark blue to light blue. How can I do this?
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1 Fix
Fix for: Change one colour to another?
If you load a GIF image, you likely have a paletted image. Make sure to change it to RGB first with: Image → Mode → RGB. Changing colors (including resize operations) won't work very well with palettes because Gimp limits its selection of colors to the colors defined in the palette. I suggest rotating Hue in Colors → Hue-Saturation. Given an initial image like this: You change Hue first by clicking on Master and then dragging the Hue slider and then adjust Brightness and Constrast to your likin…
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