Title basically. The blue is too deep, dark mode should obviously account for this and make it clearer, or at least let the user somewhere change the default font type for hyperlinks.
The dark theme doesn’t have the ability for user customisation.
The hyperlink blue in dark mode looks perfectly readable on my monitor.It may be that your monitor displays with a different sensitivity.
On the subject of themes, I do plan to add a few different themes soon, not just the dark theme. But again, they’ll be out of the box, without any customise options.