“Colour-blindness always extends to the complementary colours. Those who are red blind are also green blind; those who are blind to blue have no consciousness of yellow. This law holds good for all mental phenomena; it is a fundamental condition of consciousness.”
Source: Sex and Character (1903), p. 110.
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Otto Weininger 41
austrian philosopher and writer 1880–1903Related quotes

“How do you explain to a blind person what colour is?”
When asked by Schalke fan what is the secret to winning the Bundesliga

Talks in Europe 1968
1970s, Second Penguin Krishnamurti Reader (1973)

“we can be blind to the obvious, and we are also blind to our blindness.”
Source: Thinking, Fast and Slow

“Those who feel me near
Pull the blinds and change their minds”
Song lyrics, Cat People (Putting Out Fire) (1982)
Context: See these eyes so red
Red like jungle burning bright
Those who feel me near
Pull the blinds and change their minds.

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Source: The Bed of Procrustes: Philosophical and Practical Aphorisms (2010), p. 30

His observations on the "strange events in our solar system" and as to why the sky looked blue and red colour was used in traffic lights to signal to vehicles to stop.
When Prof Jayant Narlikar saw the sun rise in the west