When I bought my house 2 years ago, my nephews gave me a trio of all white art (seen here). My sister thoughtfully gave them a bunch of white supplies (e.g., paper, feathers, glitter, tissue paper) and let each of them create a piece of art for me. I really love this trio and they have a prominent place on my living room wall.
I find monochromatic art to be interesting, clever, and serene.
Hammock by Charles Pachter, $4000, Caviar20
Phantom Structure IV, Yves Gaucher, $2450
De.Fragment IV, $4500, 1stDibs
Untitled by Franz Klein, $212.99, Art.com
Sparkle by Georgianna Lane, $80+, Citizen Atelier
Time Forgot, $60+, Nicole Cohen