1♥-(1NT)-Pass-(Pass)
??
Note about partner's options over 1NT iso his pass:
DBL: penalty
2♣: ♦ or 4cM and 5cminor
2♦: ♥ support
2♥: ♥ & ♠
2♠: ♠
(We play the same as over a weak 1NT opener. Certainly not best after a 1NT overcall)
...partner could have signed off to all suit at 2-level, but not ♣
Does your choice change when green or at MP's?

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