purplish-red vs magenta

purplish-red and magenta both are nouns.

Word	Noun	Adjective	Verb	Adverb
purplish-red	Yes	Yes	No	No
magenta	Yes	Yes	No	No

As nouns, magenta is a hyponym of purplish-red; that is, magenta is a word with a more specific, narrower meaning than purplish-red:

purplish-red: a red with a tinge of purple
magenta: a primary subtractive color for light; a dark purple-red color; the dye for magenta was discovered in 1859, the year of the battle of Magenta

Other hyponyms of purplish-red include fuchsia, maroon.

purplish-red (noun)	magenta (noun)
a red with a tinge of purple	a primary subtractive color for light; a dark purple-red color; the dye for magenta was discovered in 1859, the year of the battle of Magenta

purplish-red (adjective)	magenta (adjective)
of red tinged with purple	of deep purplish red