fastLED choosing color / sound reactive

we are using the fastLed in our project that involves the mic sensor to have the LEDs be sound reactive. We have all the coding down for the sound aspect but cant figure out how to select the colors we want the LEDs to be in the code. Help?

I’ve attached the code we have so far to be sound reactive.

we have also downloaded into our Arduino IDE library the fastLED, FHT and FFT libraries.


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