I think prior to record companies supplying Amazon with digital art to display at 500 x 500, they manually had to scan in every cover they got. Given that that’s a pretty huge job by itself, I have to guess they didn’t spend too much (or any) time to color-correct individual scans. That yellowing on the edge of Amazon’s image is just the bowing of the staple-side of the booklet (all saddle-stitch books have this bow). Their scanner must have been slightly out-of-calibration and it drifted to the warm side of the spectrum.
It’s actually a grayscale image. On my system, it’s a faint graduation of light-grays to white. I chose to do this instead of leaving it start white to reproduce real-life viewing conditions (light sources, bow of the sleeve, etc) and to make the blind-emboss Beatles title a bit more visible.
I’m wondering if your monitor can only display 256 colors and/or is dramatically un-calibrated.
Years ago around Christmastime, I was standing out in a parking lot behind my car chattering with an artist friend. Idly, because I was somewhat restless, I dragged my fingers up and around and down on the dirt of my rear view window (I rarely washed my car). He eyed this for a moment as we chatted before reaching out and drawing the round specs and the nose and mouth.