Anybody using the Firefox browser, who thinks that the Steemit design is too harsh on the eyes, can easily install this add-on: https://addons.mozilla.org/de/firefox/addon/dark-background-light-text/?src=cb-dl-rating
Its coming direct from the Mozilla add-on library, and your screen can look like that:
But colors can also be configured to your liking. And ist free. :)