Being in Virginia I have the excellent opportunity of walking through the free museums of DC all I want. Recently at the Smithsonian American Art Museum I came across the "Color In Washington" exhibit, featuring abstract colorful art from Washington DC natives. Some of my favorites included these;
Red Azaleas Singing and Dancing Rock and Roll Music 1976 Alma Thomas
Yellow and Gray 1976 Felrath Hines ... This one was one of my absolute favorites
I also saw some gorgeous Frankenthalers and and Kenneth Noland, which you will have to discover yourself when you go to a museum by you!