Historical clue formulations

• Colors 1960s-style — 2018-08-21
• Colors, hippie-style — 2017-09-27
• Colors 1960s-style — 2016-03-06
• Colors, as hippies' shirts — 2015-05-18
• Adds color to, in a way — 2011-02-08
• Some hippie wear — 2004-03-14
• Decorates 60's-style — 2003-08-24
• Decorates 60's-style — 1998-09-12