This a tool for making custom branded color palettes for web and UI design that are built from the ground up to meet accessible contrast requirements for WCAG, ADA and Section 508. Key features:

Instead of only working with a handful of colors, you can create a whole palette of swatches at the same time so you can see if they look good together.

Precise control of every shades/tints in each swatch rather than being limited by autogenerated colors. See which color pairs contrast as you edit so you can create a palette with built-in WCAG accessibility. This way you can plan ahead which foreground colors for headings, body text, form fields and so on should contrast on which background colors. You can then create designs with your colors more quickly and with less hassle because you'll already know which color pairs have accessible contrast. Lots of export options for palettes so you can import colors into Tailwind, CSS projects, Adobe InDesign/Illustrator/Photoshop, Procreate, Affinity Designer and more.