blue-red adjective 2noun 1forms 3 adjective2 •Of a colour between blue and red; purple or crimson.This unquiet feeling increases as the hue progresses, and it may be safely assumed, that a carpet of a perfectly pure deep blue-red [translating Blaurot] would be intolerable. — 1840 •Consisting of the colours blue and red individually.a blue-red cock (rooster) noun1 •A colour between blue and red; purple or crimson.Let us suppose a red represented by the equivalent number, five, with one part of blue added to it, thus causing it to be a blue-red or crimson. — 1981 formsblue-reds · more blue-red · most blue-red