hypercolor

hyper- +‎ color. In the clothing sense, initially a trademark of Generra Sportswear Company of Seattle.

hypercolor (uncountable)

1. (physics) A hypothetical attractive force that binds prequarks together by the exchange of hypergluons, analogous to the exchange of gluons by the color force, which binds quarks together.
   • 2016, Hiroyuki Ishida, Shinya Matsuzaki, Yuya Yamaguchi, “Invisible Axion-Like Dark Matter from Electroweak Bosonic Seesaw”, in arXiv‎:

     We explore a model based on the classically-scale invariant standard model (SM) with a strongly coupled vector-like dynamics, which is called hypercolor (HC).

2. (attributive) A line of clothing, mainly T-shirts and shorts, that change color when exposed to heat.
   • 2005, Out, volume 13, number 9, page 16:

     […] hypercolor T-shirts and coffee dates […]

   • 2008, Wednesday Lee Friday, A Stabbing for Sadie, page 21:

     It's all over my blue hyper-color shirt...dammit; I've had this shirt for years. It changes color and everything...

   • 2020, Simon Rodberg, What If I'm Wrong?, page 72:

     When I was in middle school, there was a brief craze for “hypercolor” T-shirts, which changed color (mine went from blue to pink) when someone pressed their hand against the fabric.

• pyrochlore