Sorry to necro-reply this post, but I happened to notice this post elsewhere in the forums from someone stating the hex parameter still exists even though it was removed from the ST documentation. The post is part of a short thread by someone with the same complaint of setColor not working in webCoRE.
It’s all above my current knowledge level, but I hope that helps, if you haven’t already figured out how to get setColor working the way you expect it to.