Surprisingly nearly all of all our old CRT's have been Color, but my grandparents bought a fairly large-sized black & white in the '70's (the thing had a jack for an earplug) to replace various black & white sets, (the one before it was a very small, compact table-top sized) then eventually in the '80's getting their very first color...
Somehow the compact CRT my wife & I had, I believe was also a color set (a surprise considering its little size) and I remember various B&W portables growing up, that my family had, which despite being an American brand, had Japanese components, inside & all breaking down, one, by one...
-- Dave