Diamine
Inks in the violot colour grouping:
Damson
This is an interesting colour, purple with a good mixing of black to give it a very subtle look.
When using for business writing, and going back and looking at a page of meeting notes, the page looks like a black with a undercolour of purple. Most of the pens I used have had broad or stub nibs. The nibs left broad lines of line on the page so there was ample opportunity of tones to show.
The color swatch on the Diamine web site is representative of the colour I found in using the ink.
Imperial Purple
This is a bold,bright purple.
There is a richness to the tone. Despite its bright look, I find it OK for business use as well as personal notes and cards.
Good flow and drying time OK.
Ink colour, in a variety of pens with various nibs is fairly consisent with the colour swatch on the Diamine web site.
Lavender
Here is another very rich, saturated colour in the violet/purple grouping.
Lavender is not as "pastel" as I would have throught, given the name, and the more I used the ink, the more I liked the colour.
The ink performed well in a variety of pens and nibs. With broad nibs there good shading take place on the strokes. It all added to the character of the ink.
The colour swatch on the Diamin web sitre has considerably more blue tones that what I exerienced, regardless the the pen and nib combination.
Majestic Purple
This colour was issued in 2009 and when I had the opportunity to use it, it is one of violet/purple colours that I particuarly liked.
I noticed, however, there is a significant colour shift, depending the the nib style that is used. The sample above is with a Krone Fiction with a broad nib. The Krone nibs are very smooth and the Majestic Purple has good flow. There a more than adequate amount of ink being delivered to the paper.
For example, the ink appears shades darker when I used a Pelikan M1000 Oblique Medium Nib. The M1000 deliver a flood of ink to the paper. The nib is a bit narrower and I was surprised at the difference in colour tone.
The colour swatch from the Diuamine web site turns out to be in the middle of the two tones.
Violet
A softer tone in the violet/purple group.
I have used this for both personal and business writing. My personal preference is the slightly darker and saturated colour tone of Imperial Purple.
The colou swatch on the Diamine web site has considerable more blue tones and is not a good representation of the ink.
Information and reviews of other colour groups are found by the following links:


