What do all these colors mean?

Administrative Meetings—Music and choir practice, regional meetings, etc.
Children's Events—children love green, so this denotes events in the King-Dome that usually have a guest in an animal costume.
Powell Church Events—worship services, welcome meetings, picnics, etc.
Youth Events—youth group events, trips, video game marathons, etc.
US Holidays—spices dates up with a dash of context.