小藍和小黃這對好朋友不小心抱在一起，變成小綠。雙方爸爸媽媽都認不出他們。他們要怎樣才能變回自己呢？　我們都知道當不同顏色調配在一起時，會出現另一種顏色，使單調的色彩增添無限樂趣。小朋友，你想知道聰明的作者如何利用顏色的變化譜繪出一段難能可貴的友誼嗎？

Little Blue and Little Yellow are best friends, but one day they can’t find each other. When they finally do, they give each other such a big hug that they turn green! How they find their true colors again concludes a wonderfully satisfying story told with colorful pieces of torn paper and very few words. Leo Lionni launched his children’s book career in 1959 with Little Blue and Little Yellow, and this 50th-anniversary edition, complete with Lionni’s own explanation of how the book came to be, is sure to resonate with children today.