All pictures: Denim Therapy
I found the pictures at Denim Therapy. This type of dyeing is very new. Actually, that's a white item.
The jeans is colored with a kind of gel. That means, water and color be thickened and applied in various methods on the pants.
But this is my professional opinion. At least it looks like this.
Earnest Sewn has caught the colored jeans bug in the Harlan jean, a skinny low-rise jean with a zip fly. These bright jeans are being released in five cotton candy colors: bright blue, kelly green, bright orange, hot pink, red hot.