title: Is there a smart way to test a newly added dark theme feature to a web-based application?
body: <p>When dark theme is added to a website, is there a smart way to test such feature to make sure that it contains no visual &quot;mistakes&quot; (For example, an element is no visible in the dark theme because it has the same color as the background)? And what about functionality testing? Do people simply run their existing regression tests on both the dark and light theme after adding the dark theme?</p>