Currently, you can change the background of the switchbar to any color you want, but the buttons themselves remain gray unless you change the Windows theme itself.
Unfortunately, to change the buttons completely from gray, you need to patch Windows 10 and uninstall fan-made themes and hope it doesn't break the rest of Windows.
This is a minor suggestion to let the background selection under the switchbar to change the button colors, and maybe borders to the buttons, to match the background, and add a default text color to the dialog options in mIRC to compensate.
Much like we have Event/Message/Highlight, we could have Default/Event/Message/Highlight to change the switchbar. We can already make the treebar text any color we choose, but the switchbar feels like it has been left behind for those who prefer it.
