Here’s the color code chart from the 1941 Radio Today yearbook: Ads in that magazine promoting resistors were careful to note that they were RMA color-coded.

If your kids do chores, like mine, color code their tasks. All they have to do is check the chart, see their color, and they know what they're doing for the day.

The current version of the ANSI/ASME code uses a pipe labeling standard color code chart with six standard color combinations, and four user-defined combinations.

Governor Jim Justice Announces Color Coding System To Determine If Schools Can Practice/Play ...