May it please the court…In April 1987, the League of Chicago Theatres sponsored a symposium attended by more than 100 actors and directors to consider nontraditional or “colorblind” casting, a means of assigning members of other ethnic and gender groups to play roles that traditionally have been played by one race or gender.Great strides have been made in the 30 years since with color-blind casting being used in many local productions — from Goodman Theatre’s multiracial family in “A …