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

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