Some icons escape control of the mix, you can find them in /template/css/colors.css

In line 44 => .col-blue2

There is also .col-blue2-dark and .bg-col-blue2-dark line 46 and 47

for bubbles in discussions. I've already talked about it, it should be in mix, for people who do not have access to ftp and who do not know how to modify the css ...