Step 1: Find your color, I like this one
Step 2: Click "Add custom color" in label menu
Step 3: Choose that shiny black
Step 4: And select it with FireBug/DevTools/whateva
Step 5: Edit both values with your own digits
Step 6: Do the same for text color, I'll just leave it white
Step 7: Click Apply and voila!
with ❤ by Mestiso, 2011.