Describe the current limitation
When you open the User preferences you have several issues about accessibility. As an example: The purple buttons don't have enough color contrast as you see in the screenshot below.

Another example would be the text that is uppercase and too small to see with the font you use. It is very hard for people with visual impairments to use your software.

Additional context
This is just one example. I am a frontend developer and expert in accessibility and do this in my everyday life.
I want to contribute to your project with my knowledge to enhance the overall accessibility of the software.

Please let me know if accessibility is something you want to improve on and we could discuss the steps to improve the software.