Add class for a colormap of a single hue.
Add class for a colormap of a single hue.

michaelaye/vispy,dchilds7/Deysha-Star-Formation,RebeccaWPerry/vispy,jay3sh/vispy,srinathv/vispy,julienr/vispy,hronoses/vispy,Eric89GXL/vispy,jdreaver/vispy,kkuunnddaannkk/vispy,Eric89GXL/vispy,QuLogic/vispy,sbtlaarzc/vispy,RebeccaWPerry/vispy,jdreaver/vispy,sbtlaarzc/vispy,drufat/vispy,hronoses/vispy,srinathv/vispy,sh4wn/vispy,QuLogic/vispy,kkuunnddaannkk/vispy,inclement/vispy,jay3sh/vispy,inclement/vispy,drufat/vispy,hronoses/vispy,dchilds7/Deysha-Star-Formation,jay3sh/vispy,ghisvail/vispy,inclement/vispy,sh4wn/vispy,kkuunnddaannkk/vispy,julienr/vispy,michaelaye/vispy,Eric89GXL/vispy,srinathv/vispy,RebeccaWPerry/vispy,ghisvail/vispy,sbtlaarzc/vispy,michaelaye/vispy,jdreaver/vispy,julienr/vispy,QuLogic/vispy,dchilds7/Deysha-Star-Formation,bollu/vispy,sh4wn/vispy,bollu/vispy,bollu/vispy,drufat/vispy,ghisvail/vispy