The white magnolia in the yard bursts into bloom. Along the roadside, a yellow dandelion shyly lifts its head, while tender green shoots sprout on the street trees. Pink azaleas bloom, yellow forsythia blooms, and pale pink cherry blossoms bloom and fall. It is spring. This book captures the scenery of spring, gathering the lovely colors found in the flowers, fruits, and leaves that grow in our mountains and fields. It awakens the meaning of colors we've long forgotten - reminding us that red, blue, yellow, and black are all beautiful colors resembling and containing nature itself. This work clearly reflects the artist's deep interest in Korea's traditional colors, delicately depicting the flowers and fruits that grow in our mountains and fields using traditional Korean coloring techniques. As layers of base color overlap, they create a rich depth and quiet, understated beauty. To faithfully recreate the natural colors of flowers and fruits along with Korea's traditional color palette, the artist used no synthetic paints at all. Instead, the illustrations were painted on silk using traditional natural pigments once used by our ancestors - mineral pigments refined from natural stones, along with yeonji (safflower red), deunghwang (gamboge yellow), and jjok (indigo blue). Thirteen colors found in nature come alive through poetic text and elegant, delicate illustrations, inviting children into the world of color. This gorgeous picture book about color lets readers fully feel the breath of nature and the richness of Korea's traditional color sensibility, with the care and craftsmanship of handmade artistry evident throughout. The book also includes information about obangsaek and ogansaek (Korea's traditional five and intermediate colors), our ancestors' thoughts on color, and details about the flowers featured, offering additional insight for curious readers.