Why should you separate colors with laundry?
Of course, clothes are all sorts of different colors, so it is generally recommended to separate clothing by color, especially light and dark clothing. Dye in darker colored clothing can seep into lighter colored clothing during the washing process and light clothing can turn into off-shade colors and be ruined.
Wash with like colours simply means that you need to wash a garment with other garments of the same or similar colours.
Wash heavier items, like towels, seperately from lighter weight clothes to prevent abrasion and damage to finer fabrics. For the same reason, separate clothing with zippers and buttons from knits and lingerie. If an item sheds lint, wash it seperately from microfiber, corduroy or other fabrics that attract link.
A general rule of thumb is to make three piles of clothes: one for whites, one for light-colored garments, and one for dark-colored clothing. By washing these colors separately, you can avoid dark clothes bleeding onto light clothes and keep white garments from becoming dull and dingy.
The short answer is yes. Sorting, including separating laundry by color, prolongs the life of clothing and other washables. And while skipping the sort doesn't necessarily mean your clothes will be ruined, taking a few minutes to separate your wash loads just makes good sense.
It's very important to wash your lights and darks laundry separately, as darker dyes can ruin lighter fabrics. Sort your greys, blacks, navies, reds, dark purples and similar colours into one load, and your pinks, lavenders, light blues, light greens and yellows into another laundry.
Light colored fabrics are sensitive to darker dyes and can absorb them and look faded, so it's best to keep colors and darks separate for both washing and drying. Keep light colors like pinks, lavenders, yellows, light blues and light greens separate from grays, blacks, reds, navies and other dark colors.
What Happens if You Wash Black and White Clothes Together? If you wash black and white clothes together, the colors from certain fabrics may start to bleed into each other. This can cause the fabric to become stained, and it will be difficult to remove the stains once they have set in.
The short answer is yes, you can wash dark red and black together. If both fabrics are very dark, it's unlikely that any dye that leaks into the water would be enough to change any color or tone of the other fabric. Wash them in cold water to make sure that as little dye leakage as possible happens.
Be sure to wash white clothes separately from anything with colour, such as dark items or brights. Even lightly dyed items and older clothes can leech dye during a wash cycle, which can stain your whites or give them a dull, grey appearance.
Can you wash all colors together?
Don't make this a habit, but if you don't have enough items to make up a full machine load of each type of fabric and you are in a hurry, you can wash all clothes of the same color together. Just be sure to choose the correct washer cycle and use cold water to avoid damaging the most delicate garments in the load.
→ Darks: Grays, blacks, navies, reds, dark purples and similar colors are sorted into this load. → Lights: More pastel-type colors such as pinks, lavenders, light blues, lights greens and yellows are placed in this pile of laundry.

- Everyday laundry (such as cotton, linen, and items such as T-shirts, khakis, button-down shirts, underwear, and socks), and durable synthetics.
- Denim.
- Sheets, towels, and bedding.
- Delicates (such as silk and silk-like fabrics, lingerie, and embellished items)
Grey is considered a dark colour when doing laundry. As you know, your washing should be split into colour groups. Your white should have a pile, your lighter colours should and so too should your darks. Your grey clothes should go in the dark pile.
Don't make this a habit, but if you don't have enough items to make up a full machine load of each type of fabric and you are in a hurry, you can wash all clothes of the same color together. Just be sure to choose the correct washer cycle and use cold water to avoid damaging the most delicate garments in the load.
Light colored fabrics are sensitive to darker dyes and can absorb them and look faded, so it's best to keep colors and darks separate for both washing and drying. Keep light colors like pinks, lavenders, yellows, light blues and light greens separate from grays, blacks, reds, navies and other dark colors.
While it may seem OK to mix the different types of fabrics and different colored clothes to wash your laundry, doing so is actually not a good idea. Dark and light colored clothes should be washed separately in cold water. Washing clothes in cold water will mostly prevent color bleeding between clothes.