Talking colors. The HP Indigo 25K also has a built-in spectrophotometer that not only auto-calibrates the machine - also seen on more and more printers but also allows reproducing PMS colors on the spot (so to speak). At the "booth," you can see a video with Product Manager Aviram Iluz from HP match three "randomly" picked PMS colors to match - and it seems easy. Judging from the video, the result looks stunning. If you still can't get the color you want, HP offers a service called 'HP IndiChrome Ink Mixing Service,' where the user on-site can mix electro-ink from 18 different colors to match up to 97% of all PMS colors.
I believe this option is great when you need to reach a specific color, but also if you have longer print runs where you can optimize production with fewer colors - but that's just my guess :-)
Visiting HP at printing-expo.online gives you a lot of information, and though you probably could find all the same information on HP's website, it to me made sense to see the solution presented here. However, I couldn't find a link to download a brochure or get the specs, so please find the link here. I also would like you to stop by the HP Reception area. Some stunningly great case-study videos will blow your mind. I need to direct you to one specifically - called 'Cafe Pele Case Study" that by all means show the power and value of digital! Enjoy!