Uses one skein each of two different contrasting colors of the same yarn. Encourages using two slightly variegated colors. The pattern has a charted color-change pattern, with the color not used stranded across the back. Instructions for exactly how to do this technique are included in the back of the pattern book.
The Clover Hat pattern is available in Crochet in Color by Kathy Merrick, who shares in this book her secrets to designing with color in unique and unexpected ways. Merrick offers 17 patterns that explore a variety of ways to play with color that will build your crochet color confidence.