Do you mean the background color styles set from syntax tokens or decorations? That will indeed overlay the selection layer and may make the selection layer invisible. The fix sounds good to me. I'll do some more test to confirm it.

In this example, I have set the syntax.ColorScheme.Background to the background colour from Chroma syntax highlighter.

Hi, thanks for providing the details. There's a problem if we paint the selection layer after the text, as the text would look blurry or faded, severely impacting readability. There's an example that does not set the background(a lighter background color would also be ok):

The text looks burry while the original painting order does not:

The internal painter paint syntax background and decoration background before glyphs painting, for the selection layer, I would suggest using the same order to improve readability.

In your case, is it possible for you to just dismiss the background color for each single token? As the syntax token style painting is bound to the text painter, selection and text painting are processed during different phases, so I think we may not have a perfect solution for now. Separating syntax background style painting from text painting is possible but might be tricky.