赤は青と美しい対照をなす。

red; crimson; scarlet; red-containing colour (e.g. brown, pink, orange); Red (i.e. communist); red light; red ink (i.e. in finance or proof-reading); (in) the red; complete; total; perfect; obvious; copper

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

blue; green; green light; black (horse coat color); immature; unripe; young

if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)

beautiful; lovely

contrast; antithesis; comparison

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to build up; to establish; to form; to become (a state); to accomplish; to achieve; to succeed in; to change into; to do; to perform; to intend to; to attempt; to try