Can I change the color of my default avatar?
The default user avatars admittedly aren’t perfect, their color is generated by some math equation based on the user’s initials and inevitably some colors can be close or identical to others sometimes.
The way to get avatars as you want them is to upload custom ones. It can be actual pictures or any other image. If you don’t have any handy, you can use this website to create nice-looking avatars.
It lets you set any background color so you can take care to pick a different one for each of your teammates, so your avatars are easily distinguishable at small sizes.