@dmynerd78 have a look at using PWM to drive the RGB lines of the LED's - the Omega has a simple command line to drive PWM.

https://onion.io/2bt-fast-gpio-pwm/

You could probably use the Omega GPIO's through open collector transistors or mosfets to drive the LEDS, then you won't have to worry about the 5V supply as it is isolated from the Omega's 3.3V. Read up on which GPIO pins to use though as some have special functions and you need to disable them using the omega2-ctrl gpiomux command

https://docs.onion.io/omega2-docs/using-gpios.html