how to choose the right color palette game

basic rules for a good color palette (in language we understand):

ELSE IF brightnesses do not equal each other
THEN set hues to equal each other
AND set saturations to equal each other

ELSE IF saturations do not equal each other
THEN set hues to match each other
AND set brightnesses to match each other

IF hues do not equal each other
THEN set saturations to match each other
AND set brightnesses to match each other