Adobe Acrobat Pro DC 2020.006.20034
The Pro 2.5 version was relying on Adobe Acrobat Version 11.0.17. Following your question, I went ahead and updated my Adobe installation on this machine to the latest Adobe Acrobat Pro DC, version 2020.006.20034. Unfortunately, I am still getting the washed out results with 2.5 ,regardless of the color setting.
Adobe Acrobat Pro DC 2020.006.20034