Why is My Toilet Seat Turning Blue

You’re probably familiar with pink, brown, and blackish stains on your toilet seat but has your toilet ever turned up blue one day? There may be several reasons why this happens, and cleanliness isn’t one of them. Let’s look at why your toilet seat turns blue and what you can do to prevent it.

Your toilet seat can turn blue due to blue clothes, pregnancy, and chromhidrosis. This happens when the antimicrobial layer on the toilet seat comes in contact with materials that can alter its color. These stains can be removed using vinegar and baking soda solutions or a good toilet cleaning formula.

Toilet seats turning blue is a phenomenon that’s recently taken over the internet. Men and women alike are reporting the issue and looking for possible reasons for why this might be happening. Your jeans might be staining the toilet, or you may have chromhidrosis. Whatever the reason, these stains can quickly become permanent and stain your toilet seat. It’s best to clean them and take preventive measures to avoid them in the future.

Reasons Your Toilet Seat Is Turning Blue

It’s pretty strange to see a blue toilet seat, but it’s not unique. It’s something that can happen to anyone. Let’s look at some reasons why your toilet seat might be changing colors to blue.

man wearing blue jeans


Dark-colored clothes like blue jeans or black tights may leave stains on your skin. These stains can then easily be transferred onto your toilet seat. This is quite rare, though. If this is the cause, these stains can easily be removed with a wipe and a good toilet cleaner.

If the issue is persistent and the stains stubborn, you probably need to look at other causes.


This rare medical condition can cause your toilet seat to turn blue. This condition causes your sweat to turn into different colors, including black, blue, green, yellow, and brown.

Chromhidrosis can affect people of any age group, but teenagers’ most common victims. Teenage is right around the time when the apocrine glands start secreting sweat due to puberty.

Non-pathogenic bacteria react with the sweat and produce color. Anything that comes in contact with your sweat, like your clothes or even bedding, can have blue or colored stains. You may notice blue stains on your skin as well. This condition means that you won’t only be staining your toilet seat.

Antibiotics have been proven to cure this condition, but you must consult your doctor before trying to remedy the situation independently.

pregnant woman using the toilet


Estrogen and progesterone levels are mainly at their peak in pregnancy. These hormonal changes can sometimes be the culprit behind blue stains on your toilet seat.

These hormones are secreted in your sweat, and when they react with the bacteria on the toilet seat, the result is blue stains.

Progesterone and estrogen tend to alter their pH levels when they contact the ionized particles on the toilet seats. This particular change in the pH levels is what produces the color blue.

Some toilet seats also come with an antimicrobial layer that reacts with the heightened levels of hormones in your sweat when you’re pregnant. This is another cause for your toilet seat turning blue.

So, next time your seat turns blue out of the blue, you might be in for a pleasant surprise!

4 Ways to Clean a Blue Toilet Seat

Now that you’re pretty familiar with why your toilet seat may be turning blue, it’s time to learn how to clean these stains. Here are a few ways you can achieve this:

rubbing alcohol

1.    Rubbing Alcohol

Need to dissolve the stains and remove the bluish tinge? Start with some rubbing alcohol. It is an absolute star for dissolving colored stains and disinfecting surfaces. Take a piece of cloth and dip it in rubbing alcohol.

Place the cloth over the stains and let it sit for 10-15 minutes. This will allow the cloth to dissolve all the blue color, leaving your toilet seat clean!

    2. Magical Eraser Sponge

There are plenty of brands on the market that offer a magical erasing sponge. You can dampen this and rub it over the stains to remove them.

     3. Bleach

Is there anything bleach can’t clean up? It’s part of almost every powerful toilet cleaner on the market. If you’ve got a white toilet seat, then bingo! You can use bleach to clean up the blue stains in no time.

Remember, bleach is fantastic for cleaning your white toilet seat, but it can be bad for the other surfaces. So it’s best to place a protective plastic sheet around the toilet before you start cleaning with it.

Use equal parts of water and bleach and pour it over the blue stains. Let this sit for a few minutes, and then wipe away.

vinegar and baking soda in two bottles

     4. Baking Soda and Vinegar

Yet again, this magic mixture comes to the rescue. Take a cup or two of vinegar and pour this over the toilet seat. Then take a heaped cup of baking soda and put it over the vinegar.

Let the mixture react and fizz up. Take a brush and scrub the mixture until the stains completely disappear.

Frequently Asked Questions

1.    Why do toilet seats get discolored?

Toilet seats can get discolored due to limescale. When you flush the toilet, the water tends to splash on the undersides of the seat, and it can leave limescale deposits after it evaporates. Limescale develops a yellow tinge as its deposits, and it can damage the plastic on the seat.

      2. How to remove denim stains from the toilet seat?

Rubbing alcohol is the best solution for dissolving denim stains on the toilet seats. Soak a cloth in it and place over the stains for 10-15 minutes. Scrub the area afterward and wipe.

pouring coke in toilet bowl
Image from Extraclean

       3. Can Coca-Cola clean a toilet?

Pour some Coca-Cola on the edges of the toilet bowl and leave overnight. The carbonation reaction will eat away at the stains and dirt.

Final Thoughts

Blue stains can look pretty weird on a toilet seat, but they aren’t irreversible. They usually happen due to hormonal changes, and we hope our tips above for removing them prove useful for you!

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