set dark theme on the start page

Hi, I really like this due to being able to clearly read my tabs and icons- AND enjoy the scenery. Need clear print and urls when surfing or shopping ;) and I love my themes! Tx

The design is great, except the new tab page is light themed, even though the OS is in dark mode.

I like the dark theme and outline of the mountains. Changing the background colour to a light blue helps on the eyes. It's great. Thanks to the author. 2 thumbs up!