@meebers,

You can always go to Settings > Personalization > Colors (in left pane) and tweak your colors settings in right pane to your liking, like untick "Automatically pick an accent color from my background" and pick your own from the table with multicolored squares

KB4568831 Cumulative Update Windows 10 v2004 build 19041.423 - July 31-personalization-background-color.png