In any compositor (XRender still affected, but to lesser degree) the screen first appears somewhat oversaturated/of too high contrast, but on each subsequent screen redraw the entire screen becomes less and less possible to decipher until it becomes 2 bit black and white for every part of the screen except for the areas that were most recently refreshed (while other parts of the screen were redrawn, even if not refreshed.)

This bug occurs in Gnome 3, Plasma (4 and 5), and Unity, though it has no effect on non X-sessions, nor does it appear to affect login screens (sddm, gdm, or lightdm). Sessions composited using XRender are oversaturated/have too high a contrast and are oddly colored, but do not exhibit increasing saturation/contrast issues on redraw. OpenGL 2/3 are worst using GXL, though OpenGL 3 with EGL is sometimes somewhat better (though far worse than XRender.)

For a graphics card, I use a FirePro v4800 (based on Redwood XT, I believe) 

If a screenshot would help, please let me know so I can post one