Short answer. A damp microfiber and a dab of detergent on the spot before the wash. Do not scrub a white halo into navy.
The only routine that matters
Inside out, cold, darks with darks, low heat. That is the entire Yireh care philosophy. You bought the color on purpose — treat it that way in the laundry room.
Burgundy, teal, and royal blue especially do not belong in a hot load with towels.
