There is no option available to me for the Show accent color on the following surfaces. Titles bars and windows borders. I suspect that may be because of the Registry change enabling me to use the classic file explorer. Does anyone know how I can modify the file explorer to change the Title Bar color?Click on Start > Settings > Personalization. Scroll down on the right to Show accent color on the following surfaces. Titles bars and windows borders selected will work and both selected will work.