There is no direct evidence of linkage to Xi Ping Wang. His name is mentioned in our genealogy but none has shown any undisputed link to him. On the other hand our genealogy shows a pretty clear line to Lee On Jing, the ancester from the 11th century.
I don't think I've received any photos from you. You did sent some info on your generation poems and the title (in Chinese) of your ancester.
Afraid I don't know anything about colour schemes of ancestorial temples and their significants.