I’ve got a brunette bob. Although I’m 38 years old, I’ve actually got around 50% grey hair (been told by two separate hairdressers in the past).
I tend to get my hair coloured every 3 months or so to a dark brown colour (close to my natural colour before I was so grey).
The issue is that within 4-5 weeks of having professional salon colour, it goes brassy. It looks cheap and orangey. What’s going on? I do use colour protecting shampoo and I limit heat. I do swim 3 times a week so that might affect it. How can I avoid it or do I really need to colour it every 5 weeks or so?