Accessibility

https://www.microsoft.com/en-us/accessibility

https://docs.microsoft.com/en-us/dotnet/framework/ui-automation/accessibility-best-practices

https://webaim.org/articles/

http://leaverou.github.io/contrast-ratio/#%230071af-on-%23efefef

https://developer.apple.com/library/content/technotes/TestingAccessibilityOfiOSApps/TestingtheAccessibilityofiOSApps/TestingtheAccessibilityofiOSApps.html#//apple_ref/doc/uid/TP40012619

https://www.boia.org/

https://www.hhs.gov/web/section-508/index.html

https://www.invisionapp.com/blog/guide-web-content-accessibility/