How reliable are virtual hair-colour previews?

My sister and I tested hair shades after dinner because she wants a modest update before her wedding. She is currently a cool medium blonde, and she does not want guests to notice a sudden or theatrical change. The difficulty is that one sample looks much darker in phone photographs, so everyone reaches a different conclusion. One relative prefers a cooler gloss, while the photographer advised keeping the overall contrast familiar. We decided to stop voting from separate screenshots and compare the same references on printed pages by a window. Her dress is cool white, and the ceremony includes both a dim room and outdoor portraits. That combination makes consistency across lighting more important than chasing a fashionable label. We used <a href=https://find-hairstyle.top>cool winter hair colors</a> as a place to narrow the examples. Next we will photograph the shortlisted reference cards in a neutral studio corner. The stylist can then judge whether a cool gloss is the safest choice. We also plan to keep the camera settings fixed during the test. What is the simplest way to confirm a subtle colour before the wedding?