Did you spray or brush the paint on the mirror?
The mirror was purchased from Target several years ago, then painted yellow. More info in the comments section here:
downstairs bath, yellow mirror on grey wall
guest/kids bath - fun color mirror?
love the bright mirror...maybe indigo in ours
Add frame around mirror in guest bath painted yellow
I like the funky mirror - not the sink, but I like a bright cheery mirror - maybe for main floor bath
painted the mirror a bright yellow. I am in love with the result".
In the powder room: This sunny mirror is the only burst of color this neutral bathroom needs. The whimsical knobs are the icing in the cake.
Bathroom mirror. Change the look and feel of your bathroom with a coat of high-gloss paint