Which details matter in a hair color comparison?

Noahbure

My sister and I compare possible hair shades remotely, but our screens seem to tell different stories. On her phone the brown option appears reddish, whereas my laptop displays a much more muted shade. Neither of us has changed any dye yet; this is just a way to narrow down ideas. While looking for comparison tools, I found hair color simulator and wondered how people compare these pictures when their displays disagree so noticeably. Would sending the original photograph alongside each preview make the comparison easier to discuss? We could also label the options with plain descriptions instead of relying on the screenshot alone. What confuses us most is whether the difference comes from shade depth or apparent warmth. If you have compared hair previews remotely, what made the discussion clearer without pretending the picture was a dye prediction?