IntelliJ IDEA - Simplest White Markdown Theme

Well, it’s dark by default with dark theme:

But easy enough to make white i.e. to get it closer to GitHub look:

The snippet:

body {
  filter: invert(1);
  background: #fff;
  font-family: 'Segoe UI';
  font-size: 16px;

img {
  filter: invert(1); 

Thanks! You can always email me or use contact form for more questions/comments etc.