In 1970 color accuracy was "not all that good", the phosphors, color encoding,... all conspired to make pool balls hard to distinguish.Pool on television is difficult to follow when you can’t distinguish which ball is which , when the ball manufacturers truly find out what colors manifest themselves best on television it will be a quatum leap for everyone. And our sport.
During the 1980s the mfgs figured out which rare earth phosphors produced the best colors, and much of the problem went away.
Then when Cathode Ray Tubes were supplanted by (first) LCD (then later LED) (around 2004) we got to the point where original colors (primaries and blends of primary colors) actually are well reproduced on (ahem) TV.
But by this time, there were a dozen color-sets that various people had vested interests in pushing. Right after the time when it became irrelevant.