Originally Posted by hiliketoknit
It worked but there was SOME unevenness so I used the yarn tails to hide it... do you know of any other way to make it work? Thank you for your tip!
(You can see that on the right side of the yellow at the top there is still a yellow stitch on the red part that I wasn't able to hide.)
That's part of the nature of stripes done in garter stitch. Because the purl bumps show on both sides, there's going be the previous row's color show through after you change.
I don't do a lot of color work, but maybe someone else who does can help you out. This blog post
talks about the color dots showing through on ribbing, but it may be of some help to you for garter stitch.