Here you go, Pasta; https://www.thedecoratorsforum.com/professional-decorators-review-farrow-and-ball-emulsion/#:~:text=Farrow%20and%20Ball%20is%20extortionately%20overpriced%20for%20a,mind%20the%20price%20and%20poor%20coverage%20baffles%20me.
LadyCG; photographs can never do a paint job justice no matter how much light you have. However, if you are pleased with the finished article, that's all that matters.
I heard someone on TV saying that even if a store were able to match the colour, as the paints would not be made in the same way, the actual finish might be different and that would affect the appearance.
I agree with what Corby says above it's not a matter of simply matching the colour.
Farrow & Ball paints, are like the best Yorkshire puddings, they have to be made with love.