In 1958 Crayola changed the name of its Prussian blue crayon to this "timely" blue
SubscribeSubscribed... [DOC] [TLE] Marketing blunders  Crayola | Tongue Tied (Manchester) Ltd [PAR] Crayola, one of the world leading brand for crayons has changed color names 
over time due to the civil rights movement and other social and political pressures
: 1958 Prussian blue was renamed midnight blue as teachers prompted that ... 
"Tongue Tied have always been excellent at providing timely, accurate and cost... [DOC] [TLE] Brand Spotlight: Crayola (Updated) | History, Crayons and Spotlight [PAR] Crayola Crayons - remember "prussian blue" and "spring green"?