Material 2 color tool

Good ol' material color tool that still has the palette and still works https://web.archive.org/web/20230223050950/https://m2.material.io/resources/color/#!/?view.left=0&view.right=0&primary.color=F44336

Color Tool - Material Design

Color Tool - Material Design

Create and share color palettes for your UI, and measure the accessibility of any color combination.