Version: 54
OS: OS X 10.11

What steps will reproduce the problem?
data:text/html;charset=utf8,1%E2%83%A3 1%EF%B8%8F%E2%83%A3

What is the expected output?
Both should be rendered as color, just like Safari

What do you see instead?
Second one doesn't.

Interesting that UI does the reverse thing with the sequence.

This is somehow reopening of  Issue 478743 , see that issue for more details.