For the most part, these creatures are blue. Their shade of blue determines their power (magical and otherwise). They can easily go between all worlds (the land of the living and that of the dead). For the most part they keep to themselves, grazing where magic is strong and stealing offerings to other Fae on special occasions (Samhain, etc.).
*Thank you for reading. I hope you've found this informative. Don't hesitate to comment and vote. For more, go to my blog Ronel the Mythmaker to learn all you can about these fascinating creatures.*