Why do orchestras stick with bad decisions?

I was once working with an orchestra on a big digital project and as part of it, we managed to arrange for a bit of a rebrand at no extra cost. The orchestra had made a strong commitment to accessibility, and the designers pointed out that the existing brand colours were not accessible and could be improved easily. However, the orchestra decided not to change them because they had previously spent money on a focus group to choose the old colours.

Despite being presented with a better option at zero extra cost that helped them achieve their goals, they refused to change and stuck with their bad decision. Why? One answer is the “Sunk Cost Fallacy”.