This is an impressive blue sign with a white number 70 on it. It's a reminder of the maximum speed limit for drivers. If you want your coloring to adhere to the law, you should color the sign blue and the number white! If you want to be creative, you could try using different shades of blue to give depth to the sign, or even use other colors like yellow or black to create bold accents. Perhaps you could have the 70 in a glossy black or a silver metallic shine to make it stand out. Whatever colors you choose, be sure to make it relevant to the meaning of the sign. Let your imagination soar and make this sign a beautiful reminder to stay safe!