Step 1: Prepare to be disappointed. Dyeing socks for mermaids is a fool's errand. The color will likely bleed, the fabric will fray, and you will lose a scale.
These socks have been specifically designed to be imperfect. They come with random stains, holes, and an extra-large toe box.
Combine 1/4 cup of water with 1/4 cup of bleach. Stir counterclockwise while thinking of your failures.
Submerge the socks in the dye mix. Stir clockwise while thinking of your impending doom. Wait 5 minutes.