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HELP: Why do Pasted Layers Change Color???

Apr 5, 2012, 04:16
Post: #1
Question HELP: Why do Pasted Layers Change Color???
Hello,
I'm fairly competent with Gimp and can get around.
But this has been frustrating me to no end.
for some reason, and I'm sure it's a good one, when I select>>copy from one image and then Paste As Layer into a new image, parts of the copied selection change color. It's usually not a vast difference in color, but a definite change.

In the screen shot you'll see that I copied the "Learn More" link from the top image and pasted it as a layer into the 3 following background images. In the first two it pasted exact (a brownish color), in the 3rd it pasted as a drab green color. Why?
The 3 images being pasted to are all Indexed images with the same channels and same opacity.

The next example screen shot may help you identify my issue...but this one REALLY Does my head in Smile
I selected the bear by color, copied, and pasted as a layer into each one of the background images shown in the first example/screen shot.
Notice in the first, how the bear is pasted as the off brown color of the Learn More link.
The Second is pasted as the drab green color i'm trying to fix in the first example.
And the Third is pasted as the Black color I want, but its on the same image as the drab green Learn More link I can't seem to fix...

Hahhahahaha...It's driving me nuts!!!

Thanks for any help,
-EC


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Apr 5, 2012, 06:52
Post: #2
RE: HELP: Why do Pasted Layers Change Color???
Because your target image, being a GIF, is using index colors (all colors are taken among a "color map" of 256 colors max). So GIMP finds a best match to them for the colors in your copied image. To avoid this you can put the image back to RGB ("Image/Mode/RGB"...) but... since you add colors to the image, if the colormap is already all used, when you'll converting back to indexed (implicitly if you save to GIF) some color of the original GIF will be re-mapped.

Now answering your questions on
https://Gimp-Forum.net
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