Hi Daniel. Currently there are 3 colors for badges: Gold, Silver, Bronze. However, using CSS code, you can say like for all the "Gold" badges, change the color to Blue. The CSS code that you can use is:
You can also change the color for the silver badges and the bronze badge as an example below:
Color codes (#317AE2, #721EA9, #FFCC00) used in the codes above are examples and you need to replace it with your desire color code.