Just to let you know before you buy the item (still no way to preview dyes before purchases *sigh*) that it has undyeable white parts and doesn't take dark dyes at all. The default bright colours are the only ones that show up even remotely similarly to the actual dye (white is white, pale blue is pale blue), but the gown washes out all dark colours into a paler or lighter version. Furthermore the fabric is sort of default shiny so there is very little difference between 'matte' and shiny dyes that on normal fabrics look quite different.
Even though it was somewhat of a letdown, I won't be asking for a refund because the permanently white parts and the pale colours accidentally work for my Psijic character's looks, but I was really disappointed that it can't take any darker blue or other darker colours, so be warned.