Darth Piccolo said:ok look i just want all the pt lightsabers blue minus yoda tp gove more meaning to what vader said to luke about his lightsaber
He didn't say anything about the meaning/s of the color of Luke's new lightsaber - all he said was that Luke had constructed a new lightsaber and that his skills were now complete (ergo, that constructing a lightsaber was somehow the final step or task of a Jedi's abilities).