Hermes Orange: #F37022

scale_fill_manual(values=c("#C2185B","#8BC34A","#757575"),

  limits=c("NRGN","PV","NRGN_PV"),

  guide=guide_legend(title="Marker"))

• 4 colors palette

  #B91646, #DFD8CA

  #FBF3E4, #105652

• 4 colors palette

  #EEEBDD, #CE1212,

  #810000, #1B1717