A short article by Ralph Griswold on color-alternate weaves, a technique from Grünbaum and Shephard (1980) in which every other row or column of a weave draft is complemented (black and white swapped). It illustrates the idea with a 4/1/4/1 twill, a 1/3/2/1 twill and a (13,2) satin, and discusses repeating the pattern before complementation and whether the resulting fabric hangs together. The last four pages show a crackle weave with its row, column and row-column color alternates. A future article on other complementation schemes is promised.