For instance, adding alt-text and checking color contrast: - Resource for testing foreground-background color contrast: https://contrast-finder.tanaguru.com/ also https://webaim.org/resources/contrastchecker/ and https://colorbrewer2.org/#type=sequential&scheme=BuGn&n=3 (last one I just learned about). There's also a Chrome WAVE extension - Another one: https://coolors.co/contrast-checker/667faf-1f2129 - Microsoft does have built-in accessibility checkers (for when you use e.g., Word, PowerPoint, Excel)--use throughout. - Another resource from OSU ETS: https://accessible.org/wcag-2-1-aa-guide-for-beginners-or-experts-plain-english/ - https://www.fabiocrameri.ch/colourmaps/
For instance, adding alt-text and checking color contrast: