Right now, it is possible to colorize emotes, but only if you are a member of Herald. I like emotes/socials being the same color and also being the same default color as room descriptions and such. It's like reading body language in RL - you have to be paying attention to notice it. Only Heralds have the "training" to make their gestures so flamboyant that they stand out from the crowd.

True, cackling and laughter and such are out loud, but making just those kinds of socials colorized is not something I'm particularly interested in coding. Plus, that would make emotes that include vocalizations different from socials that do.

Speaking of vocal vs visible socials, people have hashed out the "how can you see him smiling if he's hidden/invisible" question ad nauseum, too. No need to go there again.