The only thing you can change in File Explorer is the font color in Navigation pane.
In SMACC it's Window Text, in the registry it 's:
The number values are RGB(Red Green Blue, values 0-255
Windows Registry Editor Version 5.00
"WindowText"="244 164 96"
SMACC is a UI for choosing colors for the above reg key.(you only need to sign out & back in, no reboot needed.)
The changes will be seen in most of the MMC snap-ins(admin tools), MRT, Optimize drives, Disk cleanup and such.