[bXVsbGVy]

Yeah, it is obvious. But word "interpolation" isn't to be found anywhere in the text.

IMO, having something like "color interpolation in HSL Cartesian space" would make it crystal clear what the tool is about. Also, "interpolation" is the keyword I'd use to search for this on Google. So, would likely be an SEO.

Unlike OP, I think it is clever to use words like "enigmatic", "mystical", etc. Not my particular taste, but it is a good branding.

About the transformation. Most libraries can interpolate on CIE's XYZ-D65, but I'm not sure how this would compare with doing operations at Cartesian coordinates of others colorspaces.

The widget from codepen also looks great. You are really good at designing color widgets.

[meodai]

I could definitely add this somewhere :D