New Varieties of Kryptonite

Readers of this blog (or readers of Superman comics) will already be familiar with the most common varieties of Kryptonite: green, red, blue, gold, and white. You may even be aware of some of the rarer varieties: orange, silver, jewel, anti-kryptonite, x-kryptonite, periwinkle, pink, and black. But even the imaginative minds behind the DC universe haven't yet exhausted the spectrum, which allows me to speculate on some new varieties . . . 

All of the following effects are temporary (lasting between a few minutes to a few hours) unless otherwise stated. 

Purple K: Causes excruciating pain when a super-powered Kryptonian uses any of their super-powers

Yellow K: Instills cowardice in super-powered Kryptonians. 

Ultraviolet K: Makes super-powered Kryptonians invulnerable to magic, but removes their super-powers. 

Indigo K: Turns the vision of ordinary humans upside-down. No effect on Kryptonians, super-powered or otherwise.

Turquoise K: Gives super-powered Kryptonians alien hand syndrome. 

Bile K: Creates insatiable hunger in Kryptonians, such that they must stop what they're doing and eat gluttonously until the effect wears off. 

Palladium K: Turns super-powered Kryptonians into obnoxious bourgeoisie snobs. 

Reverso-K: If brought into proximity of two super-powered Kryptonians (including animals such as Krypto the Superdog or Beppo the Super-Monkey), switches the consciousnesses of the two. 

Rubber K: Temporarily removes Kryptonian super-powers and replaces them with stretching abilities akin to the Elongated Man, Plastic Man, Elastic Lad, or Madame Rouge.