Historical clue formulations

• Colored like saddle shoes — 2024-07-16
• Like most semaphore flags — 2014-12-06
• Black and blue, say — 2013-10-30
• Old like some painted cars — 2010-04-01
• Colored like some cars — 2008-11-19
• Charcoal and slate, say — 2002-04-13
• Like some shoes — 1999-08-05
• Like some shoes — 1999-04-22
• Shaded, like some 50's cars — 1998-10-01