Toolbar background now white..

So, I decided to upgrade the icons in my Toolbar to new ones using Imagesets and loaded each one with a 1x (32x32) and a 2x (64x64). Looks nice on my Mac. Yet, when run on Windows 10 (& 7), the toolbar background has now turned white. My whole app looks a ghost! Same thing if I turn HiDPI off.

Using 2016r2.1. If I version back to before my toolbar mods, backcolor is the normal gray.

Any immediate thoughts?

This question can be ignored, early senior moment. Despite having the form covered I had managed to enable custom background color! Resolved