a better photo would help...

you could paint the risers black, or White.

the skirt board and wall could be painted? Add wainscotting up the stair?

Thanks!😊 here’s another photo

I'd paint from the white railing board down White incl. the risers.

Wow! What a great idea - thank you!

Now on to figuring out which shade of white (there are “millions” to choose from) makes my head spin 😆