Step 1: Neutralize the Bleach
If the bleach spill is fresh, the first thing to do is stop the chemical reaction as quickly as possible. Rinse the stained area thoroughly with cold water.
Some people also recommend using a small amount of hydrogen peroxide or a mild fabric-safe neutralizer to stop the bleach from spreading further.
Blot the area gently with a clean cloth to remove excess moisture.
Step 2: Restore the Color
One of the most common solutions for bleach stains is to restore the lost color.
Fabric markers or fabric dye can be used to carefully color the faded spot. Many craft stores sell textile markers designed specifically for clothing repair.
Choose a color that closely matches the original fabric. Apply the dye lightly and blend it into the surrounding area. Once dry, the repaired section may become almost invisible.
For larger stains, re-dyeing the entire garment can also work. This method often produces surprisingly good results, especially with cotton clothing.