Hello,
I cannot be quite sure since I don't know what exact LEDs you have, but it sounds like you have tricolor LEDs that may require some resistors to be connected in series with each of the "colored" leads. I found a tutorial that might be helpful:
https://create.arduino.cc/projecthub/muhammad-aqib/arduino-rgb-led-tutorial-fc003eI believe the best way to approach would be to use some
RGB LED Wirelings and a
Wireling Adapter TinyShield - this way you do not have to worry about connecting these tricolor LEDs and keeping track of the pins, just the labeled ports - you can also string them together, and there is an easy-to-use library, FastLED, that includes a lot of functionality that makes it easy to work with.
It depends on what you would like to accomplish!
I hope that helps!
Thanks