Clean stripes

after I almost finish the baby sweater with its fabulous stripes but I make a mistake before ribbing , I didn't knit one row with the same color I rib

OMG How did I do that I didn't make it after ribbing the neck, how do I make this mistake now, And I figure it out after I rib a few rows Oh, I'll not knit it again.
I will drop the purl sts until the first row of ribbing and knit the first one then purl the others It will be painful.

Update

 it does hurt, and didn't look good, there was a hole in the fixed sts so,

i did rip out the whole ribbing and knit one row then continued ribbing