P: Color Picker on Filter Bar not showing colors on 4K monitor

The color filter squares in the filter bar above the bottom thumbnail bar do not have color on a 4k monitor. They show as the background color with a little white dot in each square. Floating over each little square pops up a dialog with the color I'm hovering over, but that is not an efficient UI.

The color picking squares in the upper filter bar above the gallery view do show the colors. Can we get color added back to the lower color selection squares?