How do you carry yarn on the wrong side?
Carrying on the wrong side: Carrying the yarn across the row on the wrong side of the fabric is probably the easiest method to use when working with different colors. To carry a strand on the wrong side of the fabric, work over the strand every few stitches with the second color.
How do you change the color of a continuous round?
To make a standard colour change when working in continual rounds you are effectively changing colours mid- round. This is how it works: You would pull through the new colour on the last pull through of the stitch just before you want to change colour. Then you would simply continue working in rounds.