Help! I need to change the Color

I added Messages to my Menu with no problem and it was showing a blue color for the notifications. I tried updating bp-messages.css as I noticed .bpbmuc seemed to hold the color. How can I change the color of this? It seems I could only edit this color through making the theme dark/light. There is no option in settings to change the colors.

The page I need help with: [log in to see the link]