Color Theory 101: selecting yarns that go together - Shiny Happy World
Two-Color Cotton Cowl - Purl Soho
Multi Color Yarn Dyeing - Red & Blue Makes .....
Herrschners Two Tone Twist yarn, Twist Delta, lot of 2 (196 yds each) | eBay
Two Tone Toque - SkillfullyTangled
Amazon.com: Cotton to The Core Medium Weight Extra Soft Baby Cotton Blend Yarn for Knitting Crocheting Blankets, Two-Tone, 3 Skeins, 654yds/300g (Blueberry Blue)
Lily Chin Yarn - Harlem - Color 7548 - Two Tone - Tan - New | eBay