The Hudson Piston Cup is a iconic race car featured in the Cars movies. It is an eye-catching deep blue color, with two bold white stripes running down the top and bottom of the body. The car is adorned with the number 51 on either side, proudly announcing that this is the winner's car. To make the car really stand out, you could choose to highlight the stripes and the number using a vibrant shade of yellow, bringing a touch of energy to the illustration. The rest of the car could be kept in the deep blue, but you could also add shadows and shading to give a 3-D effect and extra dimension. Or, you could use complementary colors for a more vibrant and modern look.