Need to tone down blonde streaks

Hello,

My hair is naturally a medium-darkish brown and I've been highlighting it for a while. I got my roots done yesterday and I like them, but there are two chunks of hair in the front of my head that are a bit brighter than I had wanted. I don't want to have to pay to get them fixed at a salon again--is there any way I can purchase some kind of toner or dye from a drug store so I can make these highlights blend better with the rest of my hair (which has several shades of golden, caramel, and light brown tones). Any suggestions? Thanks!