Add test for transitions starting through currentColor, per https://www.w3.org/Bugs/Public/show_bug.cgi?id=14605 .
Try harder to link to tracked specification anchor.
Tweak test again to force rerun of checker.
Switch to testing the css4-color behavior rather than the css3-color behavior.
Add test
Add test for 5121: Blending simple elements
Add test for 5122: Blending video with sibling. Remove older test: blending_video.
Add test for 5123: Blending with overlapping sibling. Rework older test: mix-blend-mode-blending-with-sibling-ref.html.
Add test for 5124: Blending element is interposed. Rework older test: mix-blend-mode-blending-two-levels-of-ascendants.html.
Updates
Remove old code
Add text/css for styles
Add test
Address review comments
Remove smart quotes
Update
Address review comments
Update video test ref title
Add test 5131
Add 5132