When looking through notifications, the size and color of the icons makes it hard to quickly differentiate the three types of interactions (comment, have, like). If the icons had different colors (phave = purple, like = green, comment = white) it would be really easy to visually filter the interactions. For example, I'm most interested in responding to comments to engage more with the community, but when I have a big post with many interactions, it can be challenging to find those comments quickly.

A different color for each icon solves that!