Marking any text near a pseudo element with a background for review has introduced a lot of noise in the axe-core results. I think in part this is because we're not considering the size of the pseudo elements. If a pseudo element is a 10x10 pixel element, if it's behind a 400x100 pixel sized paragraph, the impact on it isn't going to be significant.

I would like us to add a threshold to the color-contrast rule. If we can work out the size of the pseudo element, and it is no more than 50% the area of the of the text it is near, the pseudo element should be ignored.