Ishihara Color Test

Famous quotes containing the words color and/or test:

    In Florida consider the flamingo,
    Its color passion but its neck a question.
    Robert Penn Warren (1905–1989)

    Tried by a New England eye, or the more practical wisdom of modern times, they are the oracles of a race already in its dotage; but held up to the sky, which is the only impartial and incorruptible ordeal, they are of a piece with its depth and serenity, and I am assured that they will have a place and significance as long as there is a sky to test them by.
    Henry David Thoreau (1817–1862)