What color space does the Adobe Color Wheel refer to?

When I find a color I like in the Adobe Color Wheel (https://color.adobe.com/create/color-wheel), I like to pull it over into PS as a solid fill layer for color grading. However, I notice a sometimes significant shift in the color. I know the internet is in sRGB and my image in PS is in ProPhoto. What color space does the adobe color wheel refer to? Or why do I see a sometimes significant shift in the color? Or maybe I'm just doing something wrong. I use the eyedropper on the adobe webpage, find a color I like from my image and then create a color scheme from that image. Then, I copy the new colors I like into solid fill layers for color grading.