Who to decide which color is best?

Pantone has published this book: http://www.amazon.ca/Pantones-Guide-Communicating-Leatrice-Eisemann/dp/0966638328/ref=sr_1_11?ie=UTF8&qid=1358858869&sr=8-11

It’s pretty simplistic and obvious when you read it, but it helps me organize my thoughts and start eliminating and narrowing down my options.

Color Design Group is another group to look to for research data.

Color is subjective. You need to have your group in agreement on what the brand equity is of the product you’re selling (an office is a product), agreement on the design language and user demographic.

Once you have the above centralized, you can then shift the subjective discussion from whether the color that is being chosen fits the agreed to brand identity, not whether someone likes blue better than red.

All of the above stuff can be backed with trending research (e.g. see pantone and CDG as examples). Color is Pandora’s Box, my friend.