Some numbers are believed by some to be auspicious or lucky or inauspicious or unlucky based on the Chinese word that the number sounds similar to. The numbers 6 and 8 are widely considered to be luck
Numbers 4, 13 and 14 are omitted in some Chinese buildings.
"Double happiness" ring design
Official Las Vegas Light Bulb #88 from 08-08-08
Chinese culture attaches certain values to colors, such as considering some to be auspicious or inauspicious. The Chinese word for 'color' is yánsè. In Literary Chinese, the character 色 more literally
Chinese numerology
…Chinese numerals Color in Chinese culture Culture of China…
Portrait of the Hongwu Emperor in a silk yellow dragon robe embroidered with the Yellow Dragon
The Yellow River at Sanmenxia
The Yellow River Breaches its Course by Ma Yuan (1160–1225), Song dynasty
Yellow tiles and figures on the roof the Hall of Supreme Harmony in the Forbidden City