Isn’t there also HSL?
He should also add the same “bright green” colour from his initial example to the widget at the end.
Nice catch – I’ll play with the colors a bit.
The HSL color space does exist and it is at least slightly different from HSV. However it was easiest to use skimage.colors to covert between color spaces (e.g. rgb2hsv) and they don’t have a function called rgb2hsl.