A new color space, OKLab, is gaining traction, so I was reading up on the documentation.
In the original post introducing OKLab, it says "Oklab uses a D65 whitepoint".
However, in the followup post, it says "Oklab has no concept of reference white".
When I search for these terms, wikipedia tells me that they are identical. "A white point (often referred to as reference white or target white in technical documents)".
So, what is the difference between reference white and whitepoint?
Then, what is the difference between the Lr and L discussed in the second link?
Thank you in advance.