I was playing around with something about a month or so ago and did an HTML output from JMP. The resulting Webpage looked more like the default output style used by the ODS system in SAS than a JMP report. I used to use SAS extensively for my graduate research, so I am very familiar with how that HTML output looked with its blue-gray color scheme.
(Wow, I actually found some old SAS outputs from previous work.) At the time I was more interested in getting easy-to-read output tables relative to the standard text-based reporting from the list files files generated by SAS, so I did not go beyond the default color scheme when creating HTML reports.
Where JMP is concerned, if I had a need to generate HTML, I would definitely prefer the result to look like what I created in JMP. When I was using SAS in grad school, anything that was ultimately put into publication was done by generating graphs and tables in Excel. With JMP, I try to avoid having to go to Excel to do things that JMP does very well, if not better. Going through the trouble to generate a clean report in JMP to not have a Web version reflect that effort would be disappointing.