How can I change buy buttons's color for each variant color?

[zenir_official]

hi folks. I'm using Dawn theme. 

I want the product variant color and the Buy button to be the same color when picked.
For example, if the variant color is red, I want the buy button to be red, and if it's yellow, I want it to turn yellow. 
This is what the page looks like now.

And this is example that I want. 

[TerenceKEANE]

Hi

It can be done with special work.!

Terence.