Let me see if I have this right. You want, for example a blue border, yellow center, and then blue border? It sounds like you pretty much have to use intarsia-type joining.
For example, knit across with blue, drop the blue yarn but don't cut it off, knit across with the yellow, then attach another ball of blue for the other border.
When you change colors, insert your needle for the next stitch, then make sure that the old color is being held across the back--secure it with your left hand, then knit the new color. This will prevent a hole.
And by the way--welcome!!