MikeMCrank

Have you set tolerance and threshold values both to 0?

With some changes to Win32 SWT, it's possible to get control over the color used for the ToolBar Items.  Before:  After:  With Hover: Before:  After: ...

I did a bit more work in this area, specifically for Drop Down items which were styled differently when hot. Before:  After:  You'll notice that the non-hot icons...

I've also taken some time to get toolbar buttons with text to render correctly: Before:  After:  The original problem was mentioned in eclipse-platform/eclipse.platform.swt#1696

It's worth noting that we have the complete flexibility to change the presentation here. For example, matching MacOS dark theme:  In Windows: 

I suppose we may need to move this issue into the SWT repository: https://github.com/eclipse-platform/eclipse.platform.swt