If, instead of using three colors, you only use two colors in the Flanking Colors stripe pattern, you get alternating widths of stripes of your main color. Four rows and two rows, with a single row of the contrast color in between. This pattern requires a lot of rows to see the overall result of it, and I think it would make a really pretty blanket. I probably will try something like this in the future, maybe in maroon and white.
So here's how to do this:
Work your chain and the first row in color B. At the end of the row, tie on color A, do not cut color B. Pull both through the loops to finish the stitch. Chain with both strands.
Release color B, and work row 2 with color A. At the end of the row, tie on another strand of color A. Finish the row by pulling both strands of color A through the loops. Chain with both strands.
Upon completion, the dishcloth has two thick stripes and one thin stripe of color A, and four stripes of color B. The color gets pulled up along both sides, but is not readily visible when it is two strands of the same color.
Here's the pattern:
Row 1: dc in 4th chain from hook, dc across
Row 2-14: ch 3, turn, dc across
Round 1: sc around (3 sc in corner)
Round 2: sc around (3 sc in corner)
Rows 2-5, 7-8, 10-13 are in the red color.
Rows 1, 6, 9, 14 are in the yellow color.
I made this using Sugar and Cream Country Yellow and Wine yarn with a J hook.