And then there was HyperStudio on the Mac. I'm pretty sure it had native color before HyperCard. Later versions were able to export as html5. Ted Nelson remarked, "HyperStudio was a paradigm challenge of a serious nature"
FWIW, HyperCard never had native color. There were some plug-ins to allow it to render color graphics, which enabled Myst, if I recall correctly, but HyperCard’s native tools and language couldn’t interact with the resulting renders.
