Dark mode does not make sense if you keep blue and other colors. The idea is you eliminate blue spectrum light and brightness, otherwise, it's just aesthetics.
This dark mode works a treat. For what it's worth, dark mode was enabled by default for me, even though the button said 'enable darkmode'. I had to click it again to disable dark mode which restored the blinding white theme (may I suggest a beige or baby blue instead of white?) until one last dark mode click restored the glorious, soothing gray of darkness.
You can enable it by clicking the "enable darkmode" button on your user profile.