Accessibility

W3C on accessibility: https://www.w3.org/WAI/fundamentals/accessibility-intro/

Making the Web Accessible and Web Content Accessibility Guidelines (WCAG) Overview

WAI-ARIA Overview

Web Accessibility in mind

Contrast calculator: https://contrast-ratio.com/

Good practices on accessibility: https://webaccess.berkeley.edu/resources/tips/web-accessibility

Checklist: https://www.a11yproject.com/checklist/#content