Loon's color list is used to map nominal values to colors. See the documentation for l_setColorList.
l_setColorList
l_setColorList_loon()
l_setColorList, l_setColorList_loon, l_setColorList_ColorBrewer, l_setColorList_hcl, l_setColorList_baseR, l_setColorList_ggplot2
l_setColorList_loon
l_setColorList_ColorBrewer
l_setColorList_hcl
l_setColorList_baseR
l_setColorList_ggplot2