[FEATURE] Accessibility features

[AliSajid]

Describe the feature you want 描述你的功能需求

This is a fantastic theme. I've been using it for more than two years. More recently, I have run into some trouble with accessibility settings. Specifically, related to contrast. I've looked into how to fix it, and it seems like I'd have to work a lot to customize all the colors. I was hoping you'd help make it more accessible. Specifically, by adding settings that can turn it on.

I would be happy to help.

Useful reference 有价值的参考

Here are the references:

• W3C Accessibility Guidelines (WCAG) 3.0
• W3C Accessibility Standards Overview

[Lruihao]

@AliSajid
Sorry, I'm not very familiar with Accessibility specifications. I'd be happy to improve this feature if you could send us a PR.

[AliSajid]

I'll be happy to work on this. I'm forking the theme so I can test the accessibility parts. Thank you. :)