Measuring nearly 1.25" in diameter and ripped right out of the pages of Green Lantern: Blackest Night, we have the Indigo Lantern Symbol on a cute little button!  The Indigo Lanterns wield power staves in preference to rings, enabling them to draw and manipulate energy from the Indigo-colored strain of the emotional spectrum; this power is directly linked to, and manipulated by, universally coalesced compassion.  Wear the button of the Indigo Lantern, and celebrate the ability to care for those you.. normally don't care about.