class
	WEL_COLOR_REF

General
	cluster: wel
	description: "Color defined by intensity of the red, green, blue color."
	create: make_by_color, make_rgb, make_system, make

Ancestors
	ANY
	WEL_COLOR_CONSTANTS

Queries
	blue: INTEGER_32
	green: INTEGER_32
	item: INTEGER_32
	red: INTEGER_32
	valid_color_constant (c: INTEGER_32): BOOLEAN

Commands
	set_blue (a_blue: INTEGER_32)
	set_color (color: INTEGER_32)
	set_green (a_green: INTEGER_32)
	set_red (a_red: INTEGER_32)
	set_rgb (a_red, a_green, a_blue: INTEGER_32)

Constraints
	valid red inf
	valid red sup
	valid green inf
	valid green sup
	valid blue inf
	valid blue sup