Esp. 紅い for scarlet, 朱い for vermilion

red; crimson; scarlet; vermilion

Colloquial

Red; communist

Common noun; Nouns which may take the genitive case particle 'no'

red; crimson; scarlet

Common noun

red-containing colour (e.g. brown, pink, orange)

Colloquial; Common noun; Often written as アカ

Red (i.e. communist)

Abbreviation; Common noun

red light (traffic)

Abbreviation; Common noun

red ink (i.e. in finance or proof-reading); (in) the red

Nouns which may take the genitive case particle 'no'

complete; total; perfect; obvious

赤 only; Abbreviation; Common noun

copper

Abbreviation; Common noun; Hanafuda

red 5-point card

Historical term

shu; unit of weight, 1/24th of a ryō

Historical term

shu; Edo-period unit of currency, 1/16th of a ryō

vermillion (colour); cinnabar; red orange

vermillion (pigment)

cinnabar ink stick

correction written in red ink

vermilion (colour); cinnabar

to welter in blood; to be covered in blood

to turn red

Vermilion Bird (god said to rule over the southern heavens)

Astronomy

seven mansions (Chinese constellations) of the southern heavens

red; vermilion; cinnabar; scarlet

writing in red ink

painting something vermillion; lacquering something vermillion; vermillion-lacquered object