I remember a Digikey catalogue c.2002? where it seemed like blue LEDs were the star of the show. Page after page of this new wonder. And then the following deca

I remember a Digikey catalogue c.2002? where it seemed like blue LEDs were the star of the show. Page after page of this new wonder. And then the following decade-long flood of blue-LED-festooned consumer products, where every new bit of kit needed to visually proclaim how new-fangled it was by blasting out that particularly shrill wavelength of visible light. So cool, but so annoying.