How to tone down red and green
Let's take red and green and make muted versions. Here's red and green buttercream that have been colored. To tone these down all you have to do is add some green to the red and some red to the green and mix. These two colors are complementary so when you mix them into one another they start to cancel each other out. Let's see how they turned out. There you go! Muted versions of red and green.