Picked up this great idea from AfterDRK, love this dark ombre look. To DIY, dip dye any item of clothing into black rit dye. I think it could work really well on any sort of printed item of clothing. Choose something with some black in it like this leopard print below so the pattern kind of bleeds out of the dyed part. The image below is so cool - at first I kind of thought it was a dark shadow being thrown onto the jacket.
Image: AfterDRK