<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">psychological primary colors</topic></authority><related type="broader"><topic>primary colors</topic></related><related type="broader"><topic>sight</topic></related><variant type="other"><topic>psychological primaries</topic></variant><variant type="other"><topic>psychological primary colour</topic></variant><variant type="other"><topic>psychological primary color</topic></variant> <note xml:lang="en"><![CDATA[ Refers to four basic colors, red, green, blue, and yellow, that -- together with black and white -- describe color sensations and in theory produce differing psychological effects in humans. The brain's processing of visual information on the retina is based on three sets of colors and achromatic signals: red and green, blue and yellow (absence of blue), and white and black. ]]></note></mads>