More help with color changes

[rinaldop]

I have 15 images that go from this 
   
to this 
   
middle like this 
   
and finally to this 
   

I want to change the colors from orange and black to blue and purple. Is there an easy way to do this perhaps in BIMP or is there a way to create these images from scratch? I see them used as temperature gauges in many pc stat displays like here.

https://www.pcsense.neit/kore/

Thanks!

[Ofnuts]

You can use Colors > Map > Color exchange (once for each color). Apply to a representative image of the series and save the settings to reapply them quickly to the others.

   

[rich2005]

If you want to use BIMP on separate images

Set the FG/BG to the required colors
Set the Gradient to FG to BG (Hardedge)
In BIMP Add Other Gimp Procedure and search for plug-in-gradmap  
Add the images, set the output folder

   

This is the equivalent of Colors -> Map -> Gradient Map

[PixLab]

If you lock the alpha channel you can just draw without caring for the edges with transparent area the semi transparent color will be respected as well, just use a big brush to do it in 1 dab.

   

[rinaldop]

Holy crap that worked! So easy! Such a fast reply! The people on this forum are THE BEST! Thank you all!

I just donated to both GIMP and BIMP!