What "Right off" means in this sentence?
As far as I was concerned, the sun could have melted the blue right off the sky. Then the sky could be as miserable as I was.
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Sign up to join this communityIn the cited context, right is effectively an optional intensifier (equivalent to completely, utterly, etc.).
It's equally optional in a context like Come here right now!, where including the intensifier emphasises the fact that you definitely mean now, not "in a few minutes". But note that with Come here right away! you can't just "delete" the single word intensifier - you'd also have to discard away.
The specific preposition off is preferred here because it best suits the context of something being (re)moved (by melting) so it's off = away from, no longer present where it was (the "blue" was "in" the sky; now it's gone somewhere else).
Personally, I don't think much of this particular metaphoric usage. It seems to me the writer (US poet Benjamin Alire Sáenz) is trying too hard to be "original" in his choice of metaphor, but it doesn't really work for me because figuratively speaking the primary association of blue is sad. Looked at from that perspective, the sky would better reflect the writer's misery if it just stayed blue. So to me it's perfectly good English, but poor style. That's just my "Lit Crit" opinion, though.
'Right off' means immediately or without delay. The expression 'the sun could have melted the blue right off the sky' is not an idiomatic English expression, but it appears to mean that the writer would have preferred the clear blue sky to be changed to grey and cloudy to match his/her miserable mood.