I've noticed quite a number of roses in older catalogues having the description of either a lighter or darker "reverse" than the other side of the petal, and when you look at photos or illustrations it's the opposite way. My initial impression was that perhaps the rose was incorrect too, but now I've just come to think that whoever wrote the description simply meant that the petal faces contrasted, and perhaps they had a different idea of what was the reverse and what was the front of a petal. After all, the inner face of an opening bud is, in a way, the "reverse" of a petal compared to when it's fully open when it's the "front". I suppose it can be a bit subjective. I couldn't tell you offhand the names of the roses where I've seen this type of confusing description but if I recall or come across them again I'll mention them here.