"Lithuanian keršas "black and white, variegated"

[Levia Van Kales]

Would like to confirm the etymology of the word keršas "black and white, variegated"

A Lithuanian I asked did not recognise the word keršas.
So keršas (if it exists) can mean both ”black and white” but also be brooked to describe the red, gold and green coloured Lithuanian flag, for example?
It’s ‘sisterwords’ in other tongues seem to mean black/dirty rather than b/w, variegated.
Can keršas mean variegated: huewise? mindwise? soulwise? bodywise? characterwise? good and badwise?
Could there be any links between the words “keršas“ and “curse” (the keršas of Ham)? keršas has links to blackness (so also the nature of the curse) and the word “curse” itself has an unknown/uncertain etymology?

krishna | Search Online Etymology Dictionary

 

[Platytude]

Not everyone knows every word in their own language, especially if the word has a narrow usage or is outdated. kéršas does mean "variegated [with hues of black]" and is most likely from PIE *kr̥snós. I don't think you can use it for any colour combination or apply it to flags but that should be confirmed by a Lithuanian native.

Curse is likely to have originally meant course (from Latin cursus, set of accusations for excommunication) or cross (swearing by cross), though it's not certain.

 

[AutumnOwl]

The meaning seems to be "piebald" in English:
Gyvūnų keršystė – Vikipedija
Kas yra Keršas? | Terminų žodynas