Export Sprite Sheet -> Black background and outlines changed?

Hey guys,
currently I’m trying to export a single image via spritesheet export.
When I do this my outlines are way too bright and the background is not transparent but black ?
If I save the image as a .gif , everything is fine.
Now I’m afraid what will happen when I try to draw multiple frames and save them as a spritesheet :confused:

Hi @abcNocturn, would you like to share the original .ase file to support@aseprite.org? I can take at look at it and see what is happening.

Hey @abcNocturn I’ve found that it happens when I use an indexed palette and the transparent color is not index 0 (in Sprite > Properties)
If changing the transparent index is not an option, you can also try to switch to RGB.