Theodore S. Motzlan, an Israeli-American mathematician commented that completeComplete disorder is impossible. This also means that any irregular structure if large enough, will definitely contain some ‘regularRegular’ substructure. Ramsey in 1929, proved some important results in setSet theory which gained attention due to their wide applicability. We will see how Ramsey theorems have graphGraph theory formulations and generalizations. Ramsey theory is also called as mathematics of coloring.