For some projects on the house, and to build a
course it's not some "easy" color like white or gray.
Most siding I've seen (haven't checked this stuff yet)
be done visually?
Matching dye lots that are 5 years old will be impossible. Sun and pollution will have changed the shade of the original. My suggestion is take some siding down and get paint to match it. Then side the shed with "what ever" and paint to match. Best check on painting the siding first before you use my short pier.