Where can I find Refraction Index of Red/ Yellow/ Blue in diamond?

[anom]

When white light hits the diamond at an angle dispersion will occur. I am trying to calculate what the pavilion angle should be so that all the light which enters the diamond exits from the top. But i need to find the refraction index of red yellow and blue light for diamond to be able to calculate this. I need this for a school project, so if i am wrong in something please correct me and please give me the source which you have obtained the data or info!