Historical clue formulations

• Ink cartridge color — 2025-04-23
• The "C" of a printer's CMYK — 2024-09-30
• Blue hue — 2023-06-24
• Printer toner color — 2022-10-12
• Color in a color printer — 2020-10-10
• Ink cartridge color — 2020-05-05
• Ink cartridge color — 2019-06-25
• Shade of blue — 2017-10-09
• Blue used by a printer — 2015-10-12
• Blue shade — 2015-05-10
• Blue shade — 2012-10-29
• Greenish blue — 2010-07-05
• Printer's color — 2009-12-30
• Greenish-blue — 2009-11-02
• Shade of blue — 2009-06-01
• Shade of blue — 2006-08-18
• Blue hue — 2005-07-24
• Blue-green — 2005-01-10
• Printer's color — 2004-11-09
• Color used in four-color processing — 2003-10-30
• Greenish blue — 2003-06-24
• Greenish blue — 2002-03-24
• ___ blue — 2001-10-13
• Greenish blue — 2001-04-10
• Shade of blue — 2000-09-25
• Shade of blue — 1998-10-09
• Blue hue — 1995-05-07