Question about neutrality and transparency in an amp

I don't have experience with your specific set up but all things being equal, in my system the vinyl generally has a "warmer" sound but with a trade off between the loss of some of the details at the two extremes of the frequency range. I think it all depends on the difference in the quality between the two different types of the sources. Your question is difficult to answer.

Your claim that both your speakers and integrated are, " quite colorless and neutral", should answer that question for you. Transparent, colorless and neutral all connote faithfulness to the source, or whatever’s upstream. If you want warm colored analog, pick a tubed phono stage and play with some British valves(ie: Brimar or Mullard). There are also tubed buffers, that can warm up your digital sources. Some integrated have Pre Out / Main In features(or a Tape loop), that would allow one to insert a tube buffer, and warm everything up.  Didn't see those mentioned in the Hegel's manual though.

I’m curious as to how you determined that both your Hegel amp and Dynaudio speakers are both colorless and neutral sounding. Have you listened to them both with other amps and speakers?
I ask because though I have not heard the Dynaudio Focus 160 speakers, nor any Hegel amplifiers, I have heard quite a few Dynaudio speaker models, and I can’t say that I heard any of them sound colorless or neutral. The Dynaudio speakers I have heard, sound full bodied, vibrant and warm.

That said, I don’t know that analog would necessarily improve the warmth in your system. It certainly could, however, much of that would depend on the analog and digital sources that you select. I have heard, and currently own digital and analog gear. Some analog and digital gear sound neutral and colorless, some sound rich and warm.

I think at this point it is best to continue to let your amp and speakers continue to break in. Experiment with speaker placement and toe in. Experiment with room treatment.
If you still feel that the sound is too neutral or transparent for your tastes 2 or 3 months from now, then maybe you could consider trying a different source, either analog or digital.

echobase

"I've just acquired a Hegel H160 integrated along with a pair of Dynaudio Focus 160 speakers ... The amp is quite colorless and neutral, as are the speakers ... if I connected a turntable, cartridge, and phono stage combination that, taken together, presented a decidedly warm sonic signature, would this warmth be conveyed by the amp and speakers to my ears?

By definition, if you have a neutral system and you feed it a warm signal, you'll get a warm result.