> a color hue ala pantone colors
Pantone don't own colors, what they own is the relationship between the name they have given and the color it represents.
So you can use the RGB representation of Pantone colors, no problem. You can also say "the logo color is Pantone XYZ". What you are not allowed to do is, for example, make an image processing tool that converts between Pantone color names and RGB values. And even that is debated.
Pantone is a color matching service. The idea is that you can say "use Pantone XYZ" and you know exactly how it will look like everywhere, be it on screen, in print, or as a plastic part, and Pantone business is to sell reference material that helps ensuring it is the case.
And you can't use Pantone on the web anyways, browsers don't support it (because they don't have a license), you will have to use RGB values or whatever CSS supports.