Butterflies and moths (rama-rama) are insects belonging to the order Lepidoptera, or 'winged insect scales' (lepis, scales and pterons, wings)
Butterflies usually have a brilliantly beautiful color, moths tend to be dark, dull or gray. However, these differences are always exceptions, so it can not be scientifically fixed.
Source :
https://id.m.wikipedia.org/wiki/Kupu-kupu