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I usually convert my logos to a particular colour (not just greyscale) in photoshop by using the following process: Convert to Greyscale/Choose Duotone/Select colour and click okay.

photoshop screenshot

I need to do the same thing in GIMP but can't find duotone/monotone options. I need a method of being able to do this conversion quickly and without having to select each part of the logo and the paint brush.

Does anyone have any suggestions?

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If the logo is still on its own transparent layer, at least two ways:

Alpha lock:

  1. select the layer, and set alpha-lock (checkerboard icon at top of the layers list)
  2. bucket-fill with required color (or apply whatever paint tools you fancy, such a Blend). The alpha-lock will preserve the opacity lever of all pixels.

Reusing the selection:

  1. Select the layer and Layer>Transparency>Alpha to selection
  2. Add a new transparent layer, and hide the original logo layer
  3. Bucket-fill the selection (or Blend, etc....)
  • Nice solution. Works well for converting the whole logo with the 'Fill whole selection' option of the Bucket-Fill tool. – holmberd Mar 16 '19 at 15:06

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