Could use this CSS example as a substitute until an extension becomes available.
The username colors are defined by group, so all users in the same group will have the same username color.
This code can go straight in the Admin CP > Appearance > Custom Styling, just need to replace the 2 aria-labels in each of the 4 group sections with your own and optionally change the colors to whatever you like.
(*the aria-labels are just the singular titles you’ve named each group in the Admin CP > Permissions. For example: the Admin group aria-label is Admin)
Note: I’ve only used 4 groups for this example, but you can add as many groups as you like by copying the same group section template for each additional group, or by deleting each section if you wanted to remove them.
/*******************************/
/* GROUP USERNAME COLORS */
/*******************************/
/* (§1) ADMIN GROUP - RED */
.Post-header:has([aria-label="Admin"]) .username,
.UserCard:has([aria-label="Admin"]) .username {
color: #FF0000; /* RED */
}
/* (§2) TEST GROUP 1 - BLUE */
.Post-header:has([aria-label="Test Group 1"]) .username,
.UserCard:has([aria-label="Test Group 1"]) .username {
color: #0000ff; /* BLUE */
}
/* (§3) TEST GROUP 2 - YELLOW */
.Post-header:has([aria-label="Test Group 2"]) .username,
.UserCard:has([aria-label="Test Group 2"]) .username {
color: #ffff00; /* YELLOW */
}
/* (§4) TEST GROUP 3 - GREEN */
.Post-header:has([aria-label="Test Group 3"]) .username,
.UserCard:has([aria-label="Test Group 3"]) .username {
color: #008000; /* GREEN */
}
/**************END**************/
