A very well detailed Triangle Glyph Tattoo. You can see that the pink flower is fully colored within the glyph triangle symbol as it slowly branches out into the less colored parts of the flower as the colors are only concentrated in the center.
awesome Flowers in a Lightbulb Tattoo by Medusa Lou Tattoo Artist - medusaloux
Biggest Tatto Gallery - Cacti tattoos by Vlada Shevchenko - Find Your Perfect Tatto Now
Freehand Snake by Mirko Augugliaro at Parliament Tattoo London : tattoos
Would be a neat idea for a HP tat. Swap out the planets for the deathly hallows, potion bottles, etc.