The active vs inactive checkmarks are very difficult to tell apart on this site:
When I'm scrolling down the page it's hard to tell which answer I've actually accepted (or if there is one). Yesterday I genuinely mistook the inactive check for being an active check on an answer, and I have good eyesight without colour blindness.
They both look greyish upon the yellow background.
Their contrast ratio with regards to each other is 1.1:1, or in other words their visual contrast is next to nonexistent.
(On a checker that gives us an extra decimal place, their contrast ratio is 1.07:1. The colours used are #598a1e and #818185.)
Since someone asked I thought I'd catalog what the above image pair looks like to color blindness based on simulation from ChromeLens:
Left: Protonopia, red color blindness. / Right: deuteranopia, green color blindness.
These are the two most common forms of dichromatic color blindness.
Left: Tritanopia, blue color blindness. / Right: Anachromatopsia, total color blindness.
