Pure RGB Black Not Inverting

[MaximumBeans]

Vision-impaired (blind) user here trying to get inversion to work correctly. "xcalib -i -a" will invert everything on the screen except for anything that is black, which stays black instead of turning white. Any help resolving this would be greatly appreciated, I need inversion to see my computer!
System specs:

• xcalib v0.11.0
• AMD Ryzen 9 7900X-3D using on-chip graphics for display
• Linux Mint 21.3 Cinnamon
• Kernel 6.5.0-25-generic