Am I the only one who preferred the original paint job as seen in the original concept art? I feel that it gave off more of a regal vibe than the one seen on the castle now, especially with the right mix of bronze and gold roofs.
Although, I do appreciate the Imagineers continuing the long-standing tradition of creating balance within the resort (as briefly explored in The Imagineering Story). In Chinese culture, the color yellow is seen as a representation of yin and yang, and symbolizes prosperity and good luck. Blue or green (teal, in this castle's case) are associated with harmony, among others. Those facts could probably explain why the Castle of Magical Dreams is painted the way it is now, a Hail Mary of sorts for the resort to finally prosper.