Several industry standard color names made available as CSS custom properties (vulgo: variables).

• RAL paint and pigment colors, German industry standard since 1927 in 3 variants
  • RAL Classic, extended from 40 (1927) to 216 base colors with standardized names in several European languages
  • RAL Design System (1993), CIE-Lab-based, but slightly altered subsequently
  • RAL Effect (2007), 420 plain and 70 metallic hues
  • RAL Plastics (2010) equivalents for Classic and Design
• HKS offset printing and ink colors, German industry standard since 1968 with 88 named base colors for 4 types of paper (N normal, K photo/art, Z newspaper, E continuous stationery) in CMYK
• ISO 28178:2013 C5 SWOP colors, 1617 measured samples in CMYK
• Printer Working Group (PWG) Media Standardized Names (MSN) Media Color Names, established for networked printing protocols like IPP, 20 base colors, most of them in 4 variants