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People born after 2000 have never seen the cosmic microwave background on their TV set.
(startrek.website)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.
"The sky above the port was the color of television, tuned to a dead channel." - William Gibson, Neuromancer
Gibson describes the static as metallic, silvery gray in an interview.
"The sky was the perfect untroubled blue of a television screen, tuned to a dead channel." - Neil Gaiman, Neverwhere
I remember the white static myself.