Feel free to contact me to suggest a resource.
From A Colourblind Designer To The World: Please Stop Using Red And Green Together
Andrew Wilshere, a red-green colorblind, shares the most common problems he encounters when using websites and apps.
Illustration: Mark Stebnicki
Color Contrast Grid by EightShapes
This online tool tests if the color combos are compliant with WCAG 2.0 minimum contrast. I like using it to test color combinations for buttons and text colors on different background colors.
Making a Palette Accessible
When a designer revises an existing corporate palette for accessibility, the real challenge is to sell it to stakeholders. The Designer Colin Shanley shares his insights about testing a color palette for accessibility and how to persuade stakeholders to adopt the changes.
Illustration: Colin Shanley
Auditing Design Systems for Accessibility
In this Axe-Con virtual conference, Anna Cook, Senior Product Designer speaks about how to audit components for accessibility issues from design to code using plugins, best practices, and testing tools.
Building an Accessibility Library
An interesting article about how providing designers accessibility tools have helped them to apply their knowledge and develop a greater understanding of accessibility.
WCAG for designers
A checklist wrote by the British Designer Gari Reid to help designers ensure the product they design comply with the Web Content Accessibility Guidelines (WCAG).
(I personally keep it into my favorites!)