the opposite really, measuring both tone contrast and luminosity contrast from the background average separately and extracting them is instead more robust for goods that have patterns, i.e. https://www.seven.eu/it_it/seven/zaini.html
it also works both ways, so white elements having a color accent and a dark contrast element still have them recognized for what they are
it also works both ways, so white elements having a color accent and a dark contrast element still have them recognized for what they are