Red is the traditional. People who know quilting know that the center of the Log Cabin is red and should be just that. It matches any color because of the meaning of the red square. Every sampler quilt that I make I have the center block as the Log Cabin and the center of the Log Cabin, regardless of the main color of the quilt, is always red. It goes way back and the meaning was the welcome to the home with the fire in the fireplace. You change the color and it isn't a Log Cabin anymore. Edie