This is an overview of the https://github.com/optimizasean/TailwindAccessibilityConfig repository. It's a color theme config for Tailwind CSS based on the USWDS color tokens: https://designsystem.digital.gov/design-tokens/color/overview/
Hovering will show the current # or rgb value based on the mode set (which you can toggle between: hex/rgb). Clicking the text will select it, so you can copy its value. Hovering the color circle itself will fill the color into its parent container for a better look.
A Pen by Ken Verhaegen on CodePen.