You may have to remove the spring to find it. It's usually just 3 small lines brush painted onto the spring coil. If you have the stock springs on your sled, just tell BC3 what year and model sled you have and he can tell you what spring is on your sled.
I believe your 06 Renegade came with BLUE-BLUE-BLUE.
I believe your 06 Renegade came with BLUE-BLUE-BLUE.