extension iframe is transparent, so black text on dark background is not readable. just adding `background-color: #fff;` to [main.scss](https://github.com/s12v/graphql-devtools/blob/d5ca7b07434ceb9fb3b97ae5a92dbdc9f8536dbf/client/styles/main.scss#L6) should fix it
extension iframe is transparent, so black text on dark background is not readable.
just adding
background-color: #fff;to main.scss should fix it