Final answer:
The strong yellow background in question is reminiscent of unpleasant and repulsive things.
Step-by-step explanation:
The strong yellow background is reminiscent of various things in different contexts. In one example, it is described as an old foul, bad yellow color in a strange wallpaper. In another example, it is described as a smoldering unclean yellow that is faded by sunlight. These descriptions evoke a sense of disgust and repulsion.