Actually I'm surprised you guys don't remember the colors of other intra-sectional charlesworthii hybrids.
oke: Generally the charlesworthii dorsal shape, size & color is largely recessive. Good example is (henryanum x charlesworthii) - not much pink in the dorsal, just the white background and a little flushing of pink. The flower superficially resembles an altered color form of henryanum. Paph (barbigerum x chalresworthii) is also more like an improved barbigerum than anything else. Also look at charlesworthii x complex paphs, generally the pink of the dorsal is reduced to either lines, spots or just a small flush of color, rather than a full blown pink dorsal. Even (spicerianum x charlesworthii) looks superficially more like spicerianum than the charlesworthii. With its closest cousins charleworthii is a shy one.
The magic comes in the next generation. That's when you can pick up the color again. I REALLY want to see Wossner Helene crossed to (henryanum x charlesworthii) I think that would be an exciting cross. With charlesworthii on both sides as a grandparent, This could give you white or pink dorsals on a percentage of offspring, helenae for smaller plant stature & yellows and greens, and henryanum for bold spots and pink colors in the petals & pouch - all manner of flower would be possible, some on fairly compact plants. I bet of few would be more like mini-complex reds. A selfing of Wossner Helene would be interesting too, again to recover the charleworthii dorsal in some percentage of the offspring.
Note: when breeding outside it's section charleworthi isn't always recessive. It just seems to be recessive to its close relatives. Outside its section it behaves differently.
Cheers - Leo