Can I Use Semi Permanent Hair Color....

[growingbrown]

To cover my permanent blonde hair color that was done on my entire hair over a year ago. I want a dark color of dark brown or black. Or do I have to get it professionally colored again?

 

[faithVA]

To cover my permanent blonde hair color that was done on my entire hair over a year ago. I want a dark color of dark brown or black. Or do I have to get it professionally colored again?

That should work since you are going to a darker color. And it's been more than long enough. Since you are doing semipermanent you can try doing it yourself.