When the editor’s VisualThemeType is set to VisualStudioCode or the Dark mode, the scheme colors that normally are recognized if the theme is “Custom” are not accurate. For instance, the color for the “number” style in the schemes file won’t appear correctly in the editor, nor will the color for the “idents” style. Perhaps other style names have a conflict as well. I remember an issue like this from the old QWhale product. I came to the conclusion that a scheme was inherited from the theme, but what do I know.
The solution for me was to rename “idents” to “myidents” and “numbers” to “mynumbers” in the scheme editor which thankfully does a rename-refactor automatically. Problem solved. All of my colors are accurate while using the VisualStudioCode theme, including the nice hint-scrollbar. I love it.