IIRC - he mentioned that someone _else_ had a DEC machine, and actually used it as their dev box. The dev with the DEC box person developed the kernel panic code, aka the blue screen of death - and blue was chosen because that's the default screen colour when the DEC box is turned on. The idea was to reset the colour to the default before printing the kernel panic message.

So while DEC NT is sort of a footnote, it did have this pretty profound influence : )