Here's something I learned while making the preceding pictures

[mmcirvin]

The human visual system is much more forgiving of red and blue fringes on opposite margins of an object than of green, magenta, or yellow ones.

Part of this is just that the cones aren't as sensitive to red and blue light as to yellow or green light. But I think a lot of it is that people have some built-in allowance for chromatic aberration.