accessibility

Is it necessary to include a wide variety of user accessibility features such as color contrast or different font sizes?

We're looking to launch a new version of a website, and we had multiple users concerned about readability with grey text on a grey background.

I have a case where in one view I have two switching options: "Group by" and "View as".

We have inherited the maintenance of a 10+ year old website which has a few links in it that force the link to be opened in the current tab.

In my Android app a user can choose the color of an item. This color is then shown in background with a text on it.

On a website I am creating, the user is prompted to login before they can access the main content page. However, if they do not own an account, they can create one.

Near the top of our home page, we have a search bar. Next to the search bar is a VIEW ALL button:

On trams and buses, there are often designated priority seats in a special colour for people with special needs.

I recently built a browser extension(link is external) like Vimium(link is external)

We have an application where users have to subscribe to health plans for 3,6,or 12 months.