Discussion
Assertion (A): Hue differences are usually the least tolerated of the three components.
Reason (R): The eye discriminates hue more finely than lightness or chroma at moderate levels.
Answer: C
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the mechanism. The eye is more sensitive to a shift in hue than to an equivalent shift in lightness or chroma, so a hue error is noticed first and objected to hardest. This is why tolerance ellipsoids are shortest in the hue direction and why CMC and CIEDE2000 weight that component most tightly.
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