How to understand the ancient five tones in modern times? What are the five colors?

Five tones refer to palace, business, horn, sign and feather. Five tones also refer to the pronunciation of Chinese. Five sounds are equivalent to 1, 2, 3, 5, 6 in the current notation. The five common colors, cyan, magenta, yellow, white and black, are the basic scales of ancient music in China, hence the idiom "tone-deaf". Reflect that singing pitch will be out of tune