Our perception of color is deceptive.
It depends on lighting, surrounding colors, the overall background — even on what we "know" about the object.
That’s why accurate color matching has always been a challenge for artists.
When working by the classical method — from a palette — color is selected almost "blindly".
The artist grabs a color more or less at random: the eye jumps between the palette and the subject, and the analysis happens mentally, without any clear visual reference.
Color is chosen approximately, intuitively. It’s difficult, and often leads to mistakes.
Artists have always tried to compare colors directly — by bringing a brush or palette knife close to the subject.
But because of unstable positioning, glare, and lighting differences, these attempts more often confused than helped.