when hovered, by using %, since SASS does not handle decimal mixes.
button.emoji-section { color: $borders_color; }
-button.emoji-section:hover { color: mix($fg_color, $borders_color, 0.5); }
+button.emoji-section:hover { color: mix($fg_color, $borders_color, 50%); }
button.emoji-section:checked { color: $fg_color; }
button.emoji-section { color: #1b1f20; }
-button.emoji-section:hover { color: #1c2021; }
+button.emoji-section:hover { color: #858686; }
button.emoji-section:checked { color: #eeeeec; }
button.emoji-section { color: #b6b6b3; }
-button.emoji-section:hover { color: #b5b5b2; }
+button.emoji-section:hover { color: #727574; }
button.emoji-section:checked { color: #2e3436; }