Hi Cam,
I'm not 100% sure on the species but it may be the tropical version of a Two spotted line blue Nacaduba Biocellata. But I could be wrong
It's just in my photo the markings are more distinct. They are only around 2cm in size and this one was in my front garden flying around with its mate busily around the shrubs. I had to wait patiently for it to rest to take the photo. But they are happy to be there all day and not travel too far away from the area.
I hope this helps your curiousity and thanks for showing an interest.