Where does “плав” come from?

плав (Macedonian) comes from Proto-Slavic polvъ, from Proto-Balto-Slavic palwas, from Proto-Indo-European polHwós, from Proto-Indo-European pelH- — pale, gray.

плав (Macedonian): blue

Definitions

blue

Ancestry of “плав”, step by step

Step	Language	Word	Meaning
1	Proto-Slavic	polvъ	pale yellow, yellow-white; pale; white, pale blue
2	Proto-Balto-Slavic	palwas	pale yellow
3	Proto-Indo-European	polHwós	pale, gray
4	Proto-Indo-European	pelH-	pale, gray

Every word from Proto-Indo-European pelH- →Every word from Proto-Indo-European polHwós →Every word from Proto-Balto-Slavic palwas →