Where does “blue-red” come from?

blue-red (English) comes from English blue, from Middle English blewe, from Anglo-Norman blew, from Middle French bleu, from Old French blöe, from Latvian blāvus, from Old High German blāo, from Proto-West Germanic blāu — yellow, blond, grey.

blue-red (English): Of a colour between blue and red; purple

Definitions

  1. Of a colour between blue and red; purple

Ancestry of “blue-red”, step by step

blue-red traces back through two separate lines of ancestry.

via English blue

StepLanguageWordMeaning
1EnglishblueHaving blue as its color; Depressed, melancholic,...
2Middle Englishbleweblue, azure; blue-violet; blue-grey; the colour...
3Anglo-Normanblewblue
4Middle Frenchbleublue
5Old Frenchblöeblue
6Latvianblāvusaccusative plural masculine form of blāvs
7Old High Germanblāoblue, dark, grey; blue; yellow
8Proto-West Germanicblāublue
9Proto-Germanicblēwazblue; a dark bluish or grey colour, black
10Proto-Indo-Europeanbʰlēw-yellow, blond, grey

via English red

StepLanguageWordMeaning
1EnglishredHaving red as its color; Having an orange-brown...
2Middle Englishredred, crimson, scarlet; red pigment; reddened,...
3Old Englishrēadred
4Proto-West Germanicraudred
5Proto-Germanicraudazred
6Proto-Indo-Europeanh₁rowdʰósred thing
7Proto-Indo-Europeanh₁rewdʰ-red
Every word from Proto-Indo-European bʰlēw-Every word from Proto-Germanic blēwazEvery word from Proto-West Germanic blāu