This results in an incomplete result from axe-core:

<h2 style="color: #ccc; text-shadow: 
  3px 3px oklch(60% 0.57 181),
  0px 3px oklch(60% 0.57 181),
  0px -3px oklch(60% 0.57 181),
  3px 0px oklch(60% 0.57 181),
  -3px 0px oklch(60% 0.57 181),
  -3px -3px oklch(60% 0.57 181);
">Hello world</h2>

This is the error:

Error: Unable to process text-shadows: oklch(0.6 0.57 181) 3px 3px 0px, oklch(0.6 0.57 181) 0px 3px 0px, oklch(0.6 0.57 181) 0px -3px 0px, oklch(0.6 0.57 181) 3px 0px 0px, oklch(0.6 0.57 181) -3px 0px 0px, oklch(0.6 0.57 181) -3px -3px 0px

A little while back we fixed this problem with use of color and background-color, but it seems we missed something on text-shadow. Might be good to go over the rest of the color commons, see if we missed anything else too.