> palette(setNames(c(roygbiv, NA), c("red", "orange", "yellow", "green", "blue",
+   "purple", "violet", "testapalooza")))
<palette[8]>
            red       orange       yellow        green         blue       purple
       #FF4444      #FFAE4D      #FFFF60      #50FF50      #3939FA      #AB3FFB 
         violet testapalooza
       #F68BF6          <NA>