That's indeed an interesting cross... However, it would be also interesting to see the same cross with the alba variety of charlesworthii...
on the other hand, and regarding the colors... I disagree with the comments that because the flowers are brown the cross is not good... taste in colors is a matter of fashion (yes, believe it or not we are all influenced by fashion!. A couple of years ago, it would have not been possible to think green flowers (and not only orchids) would be in vogue some day, and now they are.. on the other hand, I know a lot of people who likes brown tones.. me, for example, like a lot all the Paph with brown (earth) tones, like the plants shown here...