Add accessibility view

[rmccreath]

From @gsandrof66 - You can add dark theme feature for accessibility purposes. You have to modify your CSS file and add these lines of code at the button part. A CSS file has the capability to detect your browser windows theme preference. You have to add the rest of your CSS elements depending on the theme light/dark.

@media (prefers-color-scheme: dark) {
  body {
    background-color: #121212;
    color: #ffffff;
  }
}

@media (prefers-color-scheme: light) {
  body {
    background-color: #ffffff;
    color: #000000;
  }
}