Isn't this weird it feels like a comment war is going on, and the reason the colors go together is because they compliment eachother, not as well as yellow and purple but orange is close. Really any two colors that make brown when mixed will almost always compliment.
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drawn in 13 min
Thanks for the comments so far, people!
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Roytje: This is really cute, I love how you made the birds make a heart and again, what nice colours.
drawn in 13 min