Does hover state button text need to meet accessibility guidelines?

Yes it does. Hover state is just one of the states of a UI control, so every requirement is applicable.

1. Does hover state need to be accessible?
2. Do disabled buttons need to conform to colour contrast guidelines?
3. Which of the following is web content accessibility guidelines?
4. Why are hover states important?

Does hover state need to be accessible?

Hover effects don't necessarily make your website less accessible, provided that you follow the requirements in the Web Content Accessibility Guidelines (WCAG), which are widely considered the standards for digital accessibility.

Do disabled buttons need to conform to colour contrast guidelines?

The question: Do disabled buttons need to conform to colour contrast guidelines? The answer: No disabled buttons do not need to pass color contrast guidelines.

Which of the following is web content accessibility guidelines?

Web Content Accessibility Guidelines (WCAG) 2.1 defines how to make Web content more accessible to people with disabilities. Accessibility involves a wide range of disabilities, including visual, auditory, physical, speech, cognitive, language, learning, and neurological disabilities.

Why are hover states important?

As in the button example above, the hover state gives us feedback that we can interact with that element. By putting your cursor over the button with the mouse, the state is hover. Although we can predict the clickability of the buttons, some users cannot gain this habit.