Updating random_color generation.
Updating random_color generation.

shikhar413/openmc,liangjg/openmc,paulromano/openmc,amandalund/openmc,johnnyliu27/openmc,smharper/openmc,amandalund/openmc,paulromano/openmc,liangjg/openmc,liangjg/openmc,shikhar413/openmc,liangjg/openmc,mit-crpg/openmc,wbinventor/openmc,paulromano/openmc,paulromano/openmc,wbinventor/openmc,mit-crpg/openmc,walshjon/openmc,wbinventor/openmc,walshjon/openmc,walshjon/openmc,smharper/openmc,shikhar413/openmc,amandalund/openmc,amandalund/openmc,shikhar413/openmc,johnnyliu27/openmc,johnnyliu27/openmc,wbinventor/openmc,smharper/openmc,walshjon/openmc,smharper/openmc,johnnyliu27/openmc,mit-crpg/openmc,mit-crpg/openmc