In terms of colour, while there is no one "correct" shade of purple/violet, I have always found Roman/Tyrian purple to be one of the most pleasing of the various possible shades of purple -- and, as you can tell from the name, it has a particularly strong association with the Roman tradition tying back t to the Roman emperors and senators.
But in addition to these elements, this particular chasuble also uses a slightly wider galloon than is often seen on many contemporary chasubles. I personally find this particularly pleasing and it brings me to mind of many Roman chasubles of old that I have seen. While it might seem a minor point, it really does change the visual character of the vestment to my mind, making it more substantial and masculine in character. This is especially so at the neckline. Frequently it is common to use a thinner galloon there (as is used also for the outer edging of the chasuble) and a wider galloon for the orphrey itself, but I personally prefer this doubled usage of the wider galloon both for that and for the portions immediately found around the neckline.