Tight Chromatic Number for a class of Graphs with two forbidden   subgraphs
  Although the chromatic number of a graph is not known in general, attempts have been made to find good bounds for the number. Here we prove that for a graph G with two forbidden subgraphs and maximum degree less than or equal to 2{\omega} - 3, {\chi} equals its maximum clique size. We also give examples to show that the condition is necessary. 
Medha Dhurandhar
math.CO