The recent cleaning of frescoes in the Sistine Chapel has raised important asthetic issues. Art historians are now acutely aware that the colors of the works they study may differ from the works' original colors. Art historians have concluded from this that interpretations of the frescoes that seemed appropriate before the frescoes' restoration may no longer be appropriate.
The principle that 'the colors of an artwork are relevant to an appropriate interpretation of that work' most helps to justify the art historians' reasoning.