In order to find out how important the nursery rhymes of Park Mok-Wal and Yoon Dong-Joo to our literary history, the history of Korean nursery rhymes was reviewed and then the background in which they realized nursery rhymes was analyzed. Additionally, by analyzing the poetic words expressed in words of color within basic texts of Park’s Mountain Bird Eggs, Water Bird Eggs and Yoon’s Children Loving Stars , the poets’ poetic world will be illuminated. Park Mok-Wal valued a balance between modest locality of a child and folk songs. As monophony music sings like putting melody on religious sentences and citing, he intended to leave behind monophony works that are nature friendly and of live melody. His early works were ignored as they were said that their aesthetic space disregarded human lives. However, He succeeded to put normal routines and life experience into poetic world by reviving unique emotion and lyricism through the Korean war. That shows transferring to his own real world from mysterious aesthetic world. In Park’s nursery rhymes world, although it is easily seen to have the colors that have general feeling and cultural symbolic meaning, it is found out that in any cases the colors are connected to the feeling of sorrow. Red as a symbol of motherhood, was used to show longing for mother and illustrate feelings of loss. Although blue expresses dreams and fantasy for fairy tale worlds, it links to hopeless feelings of loss of the worlds or never reaching the worlds. White is a color of innocence and fairy tale but it is also connected to a sense of sorrow, and black links to sad feelings despite expressing unique emotions. Consequently, in Park’s nursery rhymes, red is a symbol of motherhood, blue is longings, white is innocence, and black is uniqueness. However, all those colors are connected to feelings of loss, longing, and sadness. Therefore, words of colors for him are a messenger to sing his longings and sadness and whatever colors he begins his songs with, those are said to be just the messengers to be connected to the emotion of loss and pain. Yoon Dong-Joo’s recognition on nursery rhymes looks like bright children’s songs, but they express the loss and sense of sorrow and connect to emotion of loneliness. He recognizes the tragic reality under Japanese ruling as a winter or night. He expresses metaphorically his strong will toward the nation’s poverty and future. By analyzing the colors in Yoon’s poems, just like Park Mok-Wal’s case, red expresses symbols of family and blood, blue image of transcendence, white fairy tale and innocent image, black warm and familiar past time, and all those colors are also connected to sadness and longings. Therefore, the colors seem to work as messengers for Yoon Dong-Joo just like Park’s case. Accordingly, it can be said that words of colors for Park and Yoon have functional roles as the steps to accept and sing their reality. The worlds in their works are very unique and special according to colors but all the worlds are basically concluded to their own emotional bases. Sometimes poets don’t know about their basic feelings or how to express them, but the words of colors can be said to help them release and form their emotions. It is totally understandable that poems of Park and Yoon are expressing the loneliness of reality, the will for recovery, lost reality, hopeful reality, and better reality in Japanese colony or 6.25. Meanwhile, the roles of colors are to be messengers for their ultimate goals. As stated above, Park Mok-Wal and Yoon Dong-Joo’s poems wanted to return to humanism that is good and innocent and love and dream something beautiful. They also intended to become noble national spirit and candle light in the darness by being composed in Korean under Japanese ruling. Accordingly, it is assessed that their poetic achievement and strong fighting spirit which contain their periodic literary context have left a huge foot print in Korean literature history and nursery rhyme history.