Lantern Fae by Archimicharus

Primary: Goldenrod to Sunshine | Iridescent
Secondary: Grey to Shadow, Sand to Chocolate, Emerald to Swamp, Spring to Goldenrod | Current (other colors acceptable as long as they are visibly darker than the primary)
Tertiary: Maize, Lemon or Banana | Underbelly
Breed: Fae
Lore: The idea behind it is a belly that stands out as being bright against the primary, and then a gradient from light to dark extending to the wings so that it looks like the light is emanating from the dragon's chest. This is why the tertiary has such a strict range and the primary can afford to be more lax.

Lantern Fae are helpful spirits who guide travelers who have lost their way. They dedicate themselves to the study of their surroundings, learning even the most labyrinthine of cavern by heart. The species is gifted with bioluminescence that radiates from their underbellies.

Though primitive Lantern fae had crystalline wings as bright as their hearts, their chosen home of dark caves, ruins, swamps, and forests made this trait a detriment to their survival. Thus, over generations those once glittering wings turned dark and plain, allowing them to cloak themselves in order to hide their light from predators.

A Lantern fae lays flat against any surface perpendicular to the ground and folds its wings inward to mask its brightly colored body and glowing underbelly. Their preternatural sense of hearing coupled with their near perfect memory of their surroundings allows them to be aware of everything in their proximity as well as they could sense it with their eyes. When they sense a traveler or friend in distress and are sure it is safe to come out, they reveal their warm glow in order to light the way to safety.