I have an RGB LED strip, and if I set the color to "white" via a rule the resulting color is Blue. Shouldn't all of the LEDs come on and even levels to achieve white?
Not all RGB strips are created equal (not that what you have is bad, just that the LEDs may be different). Can you manually adjust the colors to get white?
What LED strip/driver are you using? If you set the color to RGB 255, 255, 255 via the device page, does it work normally?