Update: The rainbow treatment is also available for Numerals Mono, Numerals Duo and California. Image after the jump. In this week’s release of watchOS 6.2.5 developer beta 5, Apple has snuck in ...

Click the color to start the gradient, such as the red square to create a ROYGBIV rainbow gradient. Note the color appears in the Color 1 box on the Ribbon. Click the "Color 2" button, then click ...