The first thing you need to do is choose the right colors. You can use different shades of red color to color Lightning McQueen, but there are also other colors you can use to create highlights and shadows.
To make your coloring page more interesting, add different textures. For example, use a piece of sponge or a brush to add a texture to the background. You can use a piece of paper or a sponge pressed on the paper to create a rough “asphalt” texture.
Shading and blending techniques are essential to make your coloring page look more realistic. You can use different shades of colors to create smooth transitions from light to dark. Use lighter colors to create highlights and darker colors to create shadows
The more you practice coloring, the better you'll become. Start with a few coloring pages and try different techniques. Experiment with different textures and colors until you find the combination that works best for you.