01373: Support gray and grey colours, support all basic colour keywords

%gray% gray

%grey% grey

gray

grey

%black%black
%silver%silver
%gray%gray %grey%grey
%white%white
%maroon%maroon
%red%red
%purple%purple
'''%fuchsia%fuchsia'''
%green%green
'''%lime%lime'''
'''%olive%olive'''
%yellow%yellow
%navy%navy
%blue%blue
'''%teal%teal'''
'''%aqua%aqua''' 
'''%orange%orange'''

black silver gray grey white maroon red purple fuchsia green lime olive yellow navy blue teal aqua orange