How I narrowed down a color palette without rushing

We are organizing an intimate autumn ceremony with softly cool colors. The people standing with her include friends who do not all feel good in the same shades. Nobody wants to make every person wear the same cool pastel. Instead, we are considering coordinated cool tones rather than a single prescribed shade. To give the discussion some structure, I looked at soft winter color palette and it helped me see it as a source of color relationships rather than a rulebook. We could then coordinate the group through texture and accessories as well as color. The next step is to compare several combinations in the room where the ceremony will happen. If you have organized a similar event, what helped you balance different personal palettes around one event color family? We are also keeping the venue and season in view, because a color that looks elegant on a digital board can change once it meets warm wood, candlelight, and autumn flowers. The aim is a relaxed group photograph, not a technical demonstration of a palette. Comfort matters too, since everyone will be wearing these choices for a long day.