How to Fix a Colour Run
A dark item bled onto everything else. The most important thing: do not put clothes in the dryer until the dye is out. Heat permanently bonds transferred dye.
Step-by-Step Rescue
- 1
Stop the dryer immediately — do NOT heat-set the bleed
Heat permanently bonds transferred dye to fabric. If the garment is already dry you still have options, but heat-setting makes everything harder. Open the dryer the moment you notice.
- 2
Separate the affected items from the dye source
Identify the culprit (often a red or dark item). Remove it. Keep the affected items wet — do not let them dry while you work.
- 3
Re-wash on the highest temperature safe for the affected fabric
Immediately re-run a full wash cycle without the culprit garment. Use a good detergent plus one of: oxygen bleach (for whites/coloureds), white vinegar (half a cup in the drum), or a commercial colour run remover.
- 4
Check before drying
If dye transfer is still visible after the re-wash, repeat. DO NOT dry the items between attempts — each drying cycle bakes the dye in further.
- 5
For whites: oxygen bleach soak
Mix oxygen bleach (sodium percarbonate) with warm water per packet instructions. Soak affected white garments for 1–4 hours, then re-wash. Do not use chlorine bleach on synthetics or colours — it will strip the original colour too.
- 6
For colours: colour run remover or sodium hydrosulphite
Products like Dylon Colour Run Remover contain reducing agents (sodium hydrosulphite) that break the bond between transferred dye and fibre. Follow packet directions exactly. Test on an inconspicuous area first.
By Fabric Type
What you can safely use depends on the affected fabric:
Oxygen bleach soak then re-wash
Best outcome. Cotton accepts bleach well. Chlorine bleach works but removes all colour — only use on pure white.
Re-wash + colour run remover
Oxygen bleach is safer than chlorine bleach on coloured cotton. Still risks some original colour loss.
Colour run remover or reducing agent
Polyester readily absorbs dye. Re-washing alone is often insufficient — use a proper colour run remover.
Cool re-wash + specialist wool colour remover
Standard bleach damages wool protein fibres. Use a specialist reducing agent at cool temperature only.
Cool re-wash only — minimal intervention
Silk is very sensitive. Bleach destroys it. A gentle cool re-wash is the safest option; severe bleeds may be irreversible.
Re-wash + oxygen bleach for whites
Similar to cotton. Oxygen bleach is safe. Avoid chlorine bleach on coloured linen.
Colour run remover — test first
Denim bleeds its own dye readily. If denim was the culprit, wash separately from now on. Oxygen bleach risks fading original denim colour.
How to Prevent Colour Runs
Always sort laundry: darks separate from lights
This is the only reliable prevention. New dark garments especially — red, navy, deep purple — bleed heavily on first washes.
Wash new coloured items alone or with similar colours first
Or do a test: soak a corner of the new garment in warm water for 5 minutes. If the water colours, wash it separately until it stops bleeding.
Use cold water for the first wash of new garments
Heat opens fibre structure and releases dye. Cold water limits bleeding significantly on the first wash cycle.
Use colour-catcher sheets
Laundry colour-catcher sheets (available cheaply) absorb loose dye in the water before it lands on other fabrics. Not foolproof but good as a precaution.
Don't overfill the machine
Packed machines mean more contact between fabrics and less dilution of the wash water — more dye transfers.
Wash denim and red items inside out
Reduces dye transfer from the most common culprits by limiting which surface contacts the wash water.
FAQ
Can you fix a colour run after the clothes have dried?
Yes, but it is significantly harder. Heat from the dryer partially sets the transferred dye. Use a commercial colour run remover (containing sodium hydrosulphite) and soak for the maximum time on the packet. Multiple treatments may be needed. Success rate is lower than treating wet garments.
Will re-washing fix a colour run?
Sometimes, especially if done immediately while clothes are still wet. A fresh colour run in its first wash cycle often comes out with a second wash using good detergent. If the re-wash alone doesn't work, add oxygen bleach (for whites) or a colour run remover product.
What is the best colour run remover?
Products containing sodium hydrosulphite (a reducing agent) are the most effective — they chemically break the bond between transferred dye and fabric. Dylon Colour Run Remover is widely available and works on most fabrics except wool and silk.
Will bleach remove a colour run?
Chlorine bleach works on white cotton only — it removes all colour, including any original colour and the transferred dye. On coloured clothes or synthetics it risks stripping the original colour too. Oxygen bleach (sodium percarbonate) is safer for coloured fabrics and effective on most colour runs.
How do you stop denim from bleeding onto other clothes?
Wash denim separately for the first 3–5 washes. Turn jeans inside out, wash in cold water, and use a colour-fixative product on the first wash. After several washes, excess dye is gone and denim can be washed with similar dark colours.
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