They aren't the same, and both appear to just use a tetradic collection of colours: http://www.tigercolor.com/color-lab/color-theory/color-theory-intro.htm http

They aren't the same, and both appear to just use a tetradic collection of colours: http://www.tigercolor.com/color-lab/color-theory/color-theory-intro.htm http://www.tigercolor.com/color-lab/color-theory/color-theor... It's impossible to pick a green in a tetradic scheme and not get a red, orange and blue to match it.