What artistic elements to add to a car to diminish a difference in color shade? I've got a used car that had a lot of oxidation on it so I sand it, applied a primer and a cheap paint on it. Although the color code on the spray can matched the original code on the car, it seems that there are some differences in shade. It's not fully visible but there are some angles (like the one in the picture below) that looks very obvious. I don't want to paint it again or invest any money into serious body work, but I was wondering if it is possible to add some artistic elements that would diminish this shade difference from this angle. What colors or what trim elements would help to "trick" the eye? I'm not really an artist and I can't imagine if that is even possible, but any advice on how to make this possible would be great. Any creating (and hopefully cheap) idea would help a lot. Thank you!
Add high contrast polka-dots all over the car. This will totally upstage the hand painted areas and make the fact that they don't match moot. It could be any other pattern, like zig-zagging lines, but polka-dots are the most effective due to the euphoria polka-dots trigger in the human mind.

BTW - You will never be able to just cheaply match an original or pro paint job. Auto paint is a multi-layered process involving wet sanding the layers, applying a clear top coat, etc... with specialty paints. With metallic (or flake) paint that gets even more involved. Pro painters often brag about the number of layers of top coat they use in metallic finishes to get "depth" to the effect. And even then, using the same color will not match because of fading, even if slight, of the original paint.