2.1.1299 Part 1 Section 20.1.8.42, lum (Luminance Effect)

a.   The standard states that brightness linearly shifts all colors closer to white or black and contrast scales all colors to be either closer or further apart.

In Office, brightness linearly shifts all colors closer to white (positive brightness), or black (negative brightness) and contrast scales all colors to be further apart (positive contrast), or closer together (negative contrast).

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