Pygmy Grass Blue?

Description:

This beautiful, very small butterfly was on the Andrographis paniculata - King of Bitters flower when I was trying to photograph the plant for a PN spotting. There are 2 very similar butterflies, so I think it is either the above or possibly Zizeeria maha serica - Pale Grass Blue. I don't know .. probably neither. The flower that it's on is just under 1/2" from the base to the tip where the butterfly has landed, if that is any help.