The underlying cause of this mismatch in coloring is that each browser has its own style of showing emojis. That's why you see the same emoji may look different depending on OS/browser.
In Atlan's case, we have lot of styles along with emojis in the app for different needs and the styles were overriding for certain emojis. We put a fix together on this by ordering the styles that gets loaded in the app. We expect this to resolve the mismatch display.
