Here are three color forms of C. mossiae - alba, semi alba, and coerulea.
The first is a cross of C. mossiae fma alba 'Alvaro Perriera' x lueddemanniana forma alba 'Valley Isle.'
IMG_20190531_111433741 by
Jo Beth E, on Flickr
This one is C. mossiae semi alba
C. mossiae v. semi alba x sib by
Jo Beth E, on Flickr
Here is C. mossiae var. coerulea (my favorite)
IMG_20190519_115925563 by
Jo Beth E, on Flickr
Here's the last two together.
IMG_20190519_115956307 by
Jo Beth E, on Flickr