Principle 1 – Perceivable

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Information and user interface components must be presentable to users in ways they can perceive.

I want to make sure that my site uses proper contrast ratios. Are there different contrast ratio requirements for text and for UI elements?

I'm going to add some videos to my website and I've heard that videos need audio descriptions. Is that true? Do all videos need audio descriptions?

I come across a long of links that look like buttons. Is this OK from an accessibility standpoint?

While reading up on WCAG, I noticed the terms "native widgets" and "custom widgets". What's the difference?

Do I need to add aria attributes on native elements (eg. <button role="button>)?

I've read recently that there are situations where a null or empty alt tag is appropriate. In what situations should I use an empty alt attribute?

I am curious about how to make an image act as a button and ensure it's accessible. Any guidance?

I was wondering if Google Maps is accessible or not. Do you have any info?

I am working on the accessibility of the videos we produce and was wondering how to go about adding an audio description to a YouTube or Vimeo video.

I'm working on updating my site and have become a little confused about the differences between legend and label elements. Can you explain?