Hair extensions

I have a little problem Lol I’m done with the blonde , I love it and don’t wanna get rid of it but at the same time I know it’s done and over with ( it’s brassy) and I just don’t wanna pay another 300 to get it fixed soooo I literally just wanna dye my hair brown and get it over with , so this is where the problem starts, I’m getting hair extensions too , so should I get a similar color hair extensions and dye them the same color I dye my hair so they can match sort of , or should I wait and dye my hair first then see what color it is THEN get the extensions?

I’m very impatient…lol

&&& I’m doing them myself, so I’ll be ordering them online