Setting RGB lights to white and getting blue instead is the hardware equivalent of expecting "Hello World" but getting a segfault. RGB color mixing works by combining Red, Green, and Blue channels - so white should be (255, 255, 255). But if you're getting blue, either your red and green LEDs decided to take a vacation, or someone's firmware is having an existential crisis. It's like asking for coffee with cream and sugar but receiving straight espresso with a side of disappointment. The hardware gods have spoken, and they said "no."