Where do lightsabers get their color in Star Wars? A lightsaber’s color comes from the kyber crystal within the hilt. The lightsaber’s blade takes on the color of the crystal within. A blue kyber ...

A donor-acceptor pyrazinacene derivative with triphenylamine substituents selectively detects naphthalene via π-hole⋅⋅⋅π interactions, inducing a striking, reversible color change from greenish-blue ...