Yuval Ne'eman (1925 - 2006) and Murray Gell-Mann (1929 - 2019), fathers of the quark model of baryons and mesons

The Ω^- is the classic example of why physicists had to invent color. It has spin 3/2 and consists of three identical quarks, in an s-state. Thus in order to have an antisymmetric state function, each quark must have a different color and the color state is the only part of the state that is antisymmetric.

 

Like the Periodic Table in the late 19th Century, with gaps that led chemists to new elements, the 1960s Eightfold Way is still useful in the same sense... plotting newly found multiplets leads one directly to the properties of missing, as yet undiscovered baryons and mesons!