It’s well documented since our ascent to Skywall that our people have adopted more lithe, slender forms, but this occurred over the course of many millennia. In constrast, the first recorded case of the Sky-Touched Blessing–which causes shen’dorei children to be born with vivid cerulean skin–was noted fewer than five generations ago.
Within a single generation of its first appearance, one child in twenty born amog the Skyborne bore this curious alteration. Two generations later, that rate had doubled.
(…)
The cause of this transformation may never be fully understood. Yet it is plain that, in making our lives within the elemental plane, we as a people are being changed by it in turn.
-The Sky-Touched Mystery
Guys, I think I have been touched by the Sky.