Things You'll Need
Paint (red, violet or magenta, and orange)
Red appears between violet and orange in the spectrum on the color wheel, . Some shades of red are warmer (closer to orange on the spectrum) and some are cooler (closer to violet). In order to change the color orange to cherry red (which is usually portrayed as a slightly cooler red), you must add a lot of red, and negate the warmer tones of the orange. This takes some experimentation, and some familiarity with the color wheel.
Place a small amount of red and violet (or magenta) paint on the palette next to the orange paint.
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Dip your paintbrush in the red paint, and mix it with the orange paint. It doesn't take much red to change a color dramatically, so proceed cautiously, lest you waste paint.
Study the color you have made. It should be an orange-red color.
Dip your paintbrush in red again and repeat Step 3 two or three more times, until the orange-red color has become mostly red.
Dip your paintbrush in a tiny bit of violet (or magenta). Mix that with the red-orange color you have created. You're trying to cool the red a little, to negate the effects of the orange.
Dip your paintbrush in more red, and mix it again with the red-orange. Repeat these steps (adding much more red than violet) until you have reached the appropriate hue.