How do you knit stripes without the seam showing?

How do you add a new color without showing the change in stitches? one side will show it and the other side won’t. How do make stripes with 2 or more colors?]
Thanks to anyone who helps!
:cheering:

bump

The back side always shows the color change in the purl bumps so change your yarn as you are starting a knit row on the front side.