Hi, Nice to see that, but need a couple days before have much time.
First helpful thought goes to the LED power consumption, if always ON it matters more: Wanted to mention the 'white emitting' LEDs salvaged from a Christmas snow related twinkle lights or icecycles (sic) and measured current was exceptionally low!
Something approximately 30 uA. Voltage of system is not directly relevant. Many LEDs tend to operate higher, say approaching one mA, or greater. That's 30 times less, but might be hard to get all RGB where you'd like.
How about use the most efficient (color) and just have an RGB set-up for a background disk. Plus, adaptive or set-able brightness, for better looks, softer or brighter, as you please... More comments later, thanks