No one dyes their hair with the intention of it looking brassy a few weeks later.

However, it’s a common scenario.

Hair can become brassy when the natural hue is taken away and replaced with dyed color.

Woman with blond hair

Blond hair may turn orangey, and platinum hairmay turn yellow.

Even dark hair can turn brassy.

In brunettes, brassiness may show up as red highlights.

Woman brushing messy brown hair

Some things are in your control, but some are not.

This involves several steps and isn’t something you’d be able to do at home.

You’ll want to confirm that the colorist uses a toner that will work to keep warm undertones hidden.

Woman wearing hat in the sun

Celebrity hairstylist Kristin Ess agrees and says it’s always best to avoid color-correcting yourself (viaElle).

“If you need any major colorwork, you should always go to a pro, she says.

When swimming, whether in the pool or at the beach, wear a tight-fitted cap.

Pool water contains chlorine, which removes color from your hair and can damage it.

At the beach, saltwater is also abrasive and damaging.

At home, pay attention to washing your hair (viaVoce).

Use a shampoo and conditioner specifically for color-treated hair, preferably one without sulfates, which can damage hair.

Use cool water since hot water makes color fade quicker and induces brassiness.

Also, don’t wash your hair daily.