Montblanc seem to be shaking up their line a bit, Midnight Blue is no longer listed as being a permanent ink and two new permanent inks are being introduced.
The packaging is the same format as the existing inks with new graphics, All white with blue and black text. The bottle is the same shoe as we are used to with the existing line up (with the nice two part filling arrangement).
Included below are samples of the new ink, and some from Royal Blue for comparison. My scanner is now older than some forum members, that is to say rather tired. I have taken photos in direct sunlight for comparison. Both inks were in Lamy Safari pens with medium nibs.
I like it, it's quite a nice colour and performs well on Rhodia paper, on cheap pulp the performance would suit one sided use, where the appearance is good but the bleed and show through are worse than non-permanent equivalents. The biggest downside is the price, these new inks are being sold from MB at £19 a bottle compared to £11 for the standard inks. For my uses (typically on FP friendly papers) I would stick to Royal Blue.