How to customize xclock background appearence to be dark? Alternative suggestions welcome.

I tried and tried, looked through the man pages and forums but all I could change was the hands colours of xclock. What I want is a black background for xclock with white hands. I'd also appreciate time numbers which I just couldn't figure out.

I use Arch+i3-gaps and in my first workspace I have 1 window running "xclock -update 1" and "xclock -digital -update 1" side by side. The only issue is the eye blinding light background. I would be happy with this same setup but with a dark background.

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