halo effect

If the original background colour on the image is markedly different, you may see a halo effect around the transparent image.

Here is an example of the transparent image (original background colour was white) as it would look against a dark background. To the right is the same image against a light background.

transparency against inappropriate background transparent image on light background

Save as GIF . Delete unused colours . Set background colour . Set the transparency . Remove background noise . Check your work

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