How to use your own colors in Gmail labels?

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.