This study takes the color aesthetic system of the Kizil Thousand-Buddha Caves—an outstanding representative of Qiuci art—as its research object, conducting an in-depth interpretation of its color combination principles and cultural symbolism from a design perspective. Through a two-way approach combining digital preservation of cultural heritage and innovative design application, a theoretical model and practical methodology for the modern application of Kizil’s traditional colors have been established. For the first time, this paper introduces the Kizil color aesthetic system into the field of contemporary fashion design. Supported by three design series practices, it explores the dialogue mechanism between traditional color language and modern design contexts, providing theoretical support and practical cases for constructing a design education system with Chinese characteristics.