This is a Haematoxylin and aniline blue. I found a wonderful example of this being used in which it was claimed that elastic fibers stained dark purple, and collagen blue. It turns out that haematoxylin staining is much more complicated that I initially hoped however. According to >this site, haematoxylin is “not a dye…[and has] little or no affinity for tissue elements and requires an inorganic ion to act as a ‘go between’ between the dye and the tissue.” Well, NO WONDER it didn’t work! Apparently a ferric salt can be used in some way (further research is needed here).