I'm still in the learning process and was trying to work with whites because it's cheaper and doesn't need as much color mixing. Sometimes I the whites look different, and when color matching, different shades of white appear to match, but when put side by side they look so different.
If it matters, I check colors on a palette knife with dried on paint to avoid reflection.
Comments
Needs caution, too much white is often used to brighten colour. The result is often a chalky, flat looking scene, lacking a focus zone.
Denis