Planar Attunement is an alternative advancement system introduced in Patch 1.5. Activated when a player reaches level 50, players earn experience points by questing, killing mobs and completing quests.
Planar Attunement points are granted when you level. The number of points you have accumulated appear in the lower-left hand corner of the Planar Attunement window. These points can be spent in one of the six attunement trees: Earth, Air, Fire, Water, Life, and Death.
The cost of each advancement is the large number at the top of the hex, while the rank is displayed in the tooltip and the bottom of active hexes. Once a tier is fully complete, meaning all advancements are purchased at max rank, it will unlock the second tier in that plane.
Blue - increases a core stat
Green - increases defense toward a specific planar type
Yellow - increases offences toward a specific planar type
Purple - alters movement or increases the amount of planar charges available
Red - improves weapon mastery
http://rift.zam.com/en/pa.htmlTo unlock every slot to it's fullest would take 1034 levels.