I have three partitions: First one is Ventoy with a couple of distros per architecture. Partition two is a standard exfat partition for files. Partition three is a small fat16 partition, since there’s always that one device someone has (oscilloscope, 3D printer, UEFI/BIOS, etc.) that only supports very simple file systems. I’ve had to use the fat16 partition more than a couple of times and I don’t even work with legacy hardware.

Oh I see, that is odd. I thought your background was yellow beforehand. Is it perhaps plasma’s Night Light? That will tint everything yellow when it’s enabled.

New plasma update sets the accent colour from your background. To change it go to System Settings > Colours and Themes > Colours (not sure if Mint has it in the same place) then set the accent colour you like from the top.