Comparing hair color upkeep around changing shifts

Miael

For a remote style workshop, I need to present several hair color options using a single portrait. I would like useful comments on the shades, with as little distraction from the layout as possible. Using one crop seems important because a closer face can make one version feel much more striking. While looking into a hair color simulator I started making a checklist of the settings that should stay consistent. I plan to keep the original background and avoid making one version brighter just to improve its appearance. Numbering the alternatives might encourage more specific observations than presenting them with attractive color names from the start. I will explain that the images are discussion aids and cannot show exactly how real coloring would turn out. After the first comments, I can add the labels and ask whether anyone wants to revise their description. What else would you hold constant to make a side-by-side hair color discussion more useful?