Where does “серо-голубой” come from?

серо-голубой (Russian) comes from Russian голубо́й, from Old East Slavic голѫбъ, from Proto-Slavic *golǫbъ — blue.

серо-голубой (Russian): blue-gray; gray and light blue

Definitions

  1. blue-gray; gray and light blue

Ancestry of “серо-голубой”, step by step

серо-голубой traces back through two separate lines of ancestry.

via Russian голубо́й

StepLanguageWordMeaning
1Russianголубо́йlight blue, sky blue, azure contrasts with
2Old East Slavicголѫбъlight blue
3Proto-Slavic*golǫbъblue

via Russian се́рый

StepLanguageWordMeaning
1Russianсе́рыйgrey
2Proto-Slavicśěrъgray
Every word from Proto-Slavic *golǫbъ →Every word from Old East Slavic голѫбъ →Every word from Russian голубо́й →