The difference between Red and Yellow

Red as an adjective:

Having red as its color.

Red as an adjective (of hair):

Having an orange-brown or orange-blond colour; ginger.

Red as an adjective (card games, of a card):

Of the hearts or diamonds suits. Compare

Red as an adjective (often, capitalized):

Supportive of, related to, or dominated by a political party or movement represented by the color red: the U.S. Republican party Left-wing parties and movements, chiefly socialist or communist, including the U.K. Labour party and the Social Democratic Party of Germany.

Red as an adjective (chiefly, derogatory, offensive):

Amerind; relating to Amerindians or First Nations

Red as an adjective (astronomy):

Of the lower-frequency region of the (typically visible) part of the electromagnetic spectrum which is relevant in the specific observation.

Red as an adjective (particle physics):

Having a color charge of red.

Red as a noun (countable, and, uncountable):

Any of a range of colours having the longest wavelengths, 670 nm, of the visible spectrum; a primary additive colour for transmitted light: the colour obtained by subtracting green and blue from white light using magenta and yellow filters; the colour of blood, ripe strawberries, etc.

Red as a noun (countable):

A revolutionary socialist or (most commonly) a Communist; a Bolshevik, a supporter of the Bolsheviks in the Russian Civil War.

Red as a noun (countable, snooker):

One of the 15 red balls used in snooker, distinguished from the colours.

Red as a noun (countable, and, uncountable):

Red wine.

Red as a noun (countable, informal, birdwatching):

A redshank.

Red as a noun (derogatory, offensive):

An Amerind.

Red as a noun (slang):

The drug secobarbital; a capsule of this drug.

Red as a noun (informal):

A red light

Red as a noun (Ireland, UK, beverages, informal):

red lemonade

Red as a noun (particle physics):

One of the three color charges for quarks.

Red as a noun (US, colloquial, uncountable):

chili con carne (usually in the phrase "bowl of red")

Red as a verb (archaic):

Red as a verb:

Yellow as an adjective:

Having yellow as its colour.

Yellow as an adjective (informal):

Lacking courage.

Yellow as an adjective (publishing, journalism):

Characterized by sensationalism, lurid content, and doubtful accuracy.

Yellow as an adjective (chiefly, derogatory, offensive):

Far East Asian .

Yellow as an adjective (dated, Australia, offensive):

Of mixed Aboriginal and Caucasian ancestry.

Yellow as an adjective (dated, US):

High yellow.

Yellow as an adjective (UK, politics):

Related to the Liberal Democrats.

Yellow as an adjective (politics):

Related to the of Germany.

Yellow as a noun:

The colour of gold, butter, or a lemon; the colour obtained by mixing green and red light, or by subtracting blue from white light.

Yellow as a noun (US):

The intermediate light in a set of three traffic lights, the illumination of which indicates that drivers should stop short of the intersection if it is safe to do so.

Yellow as a noun (snooker):

One of the colour balls used in snooker, with a value of 2 points.

Yellow as a noun (pocket billiards):

One of two groups of object balls, or a ball from that group, as used in the principally British version of pool that makes use of unnumbered balls (the (yellow(s) and red(s)); contrast stripes and solids in the originally American version with numbered balls).

Yellow as a noun (sports):

A yellow card.

Yellow as a verb (intransitive):

To become yellow or more yellow.

Yellow as a verb (transitive):

To make (something) yellow or more yellow.