It is notable that of the major proponents of coral, they are all very religious, usually traditionally so. Thoreau -- transcendentalist, Tolstoy -- Christian, Gandhi -- Hindu, Teilhard deChardin -- Catholic, King -- Protestant, Mandela -- Christian, Nhat Hanh -- Buddhist.

This is untrue of yellow: unreligious: Middle Goethe, Melville, Nietzsche, Sartre, Camus, Wired; religious: Kierkegaard, Dostoevsky.

Turquoise witnesses a merging of the religious and secular: Late Goethe, Emerson, Dickinson, Frost, Rilke, Heidegger, Einstein, Fuller, Sheldrake.