It can also be interesting to look at number symbolism in addition to colors in relation to sexuality and spirituality. I know very little about number symbolism so I have to put it together on the fly.
"In Agrippa von Nettesheim’s De occulta philosophia (1533; “On the Philosophy of the Occult”), 2 is the symbol for man, sex, and evil. " -- https://www.britannica.com/topic/number-symbolism
So, according to that number symbolism, the number 2 is connected to man, sex and evil. Does that mean that both man and sex are evil? No, I think the number 2 means the duality in third density. And the evil comes from missing the heart connection, which is represented by the number 3. So third density has only two dimensions of action as in polarity and duality; us vs them, me vs you, service to self vs service to others.
Also the number 666 is often associated with evil:
"This calls for wisdom. Let the person who has insight calculate the number of the beast, for it is the number of a man.[e] That number is 666.
e. Revelation 13:18 Or is humanity’s number
" -- Revelation 13:18
666 = humanity's number?! WTF? How can that be true? We are NOT evil!
The answer is that it represents humanity in our "fallen" third density state, with duality polarisation. 6 = 3 * 2. And six three times means that there is trinity, meaning heart connection, but it is broken by the number 2. So the (or at least one) number for humanity in fourth density is 999, symbolizing a healed and complete heart connection (9 = 3+3+3), and we have entered the ninth wave of creation in the Mayan calendar.https://www.youtube.com/watch?v=Sli0uyHcFhA
"Nine is the number of magic.
Nine is a sacred number.
Nine is the number of completion and fulfillment.
Nine is a symbol of wisdom and good leadership.
Nine is the number of heaven." -- https://mysticalnumbers.com/number-9/
"Be it ‘navaratri' or ‘navagrahas', number nine is a significant part of the Indian psyche from time immemorial." -- http://www.thehindu.com/life-and-style/ ... 514648.ece