No, it's a really interesting situation, doesn't directly claim to have lightness like Lab/LCH, or that there's something fundamentally good about having a blue-yellow gradient. But the L thing is crucial for WCAG (c.f. article), and designers, and the blue/yellow stuff is interesting.

- it's _not bad_ Its better than HSL in that its lightness is correlated to "true lightness", and it's __much__ simpler to implement than a more complex thing like HCT's CAM16 x L. That's about 500 LOC, versus 15 I'd guess. And substantially faster too, few mat muls in each direction.

- Oklab L is not L: The problem for engineers and designers: no relation to LAB L*/XYZ Y, so no correlation to WCAG.

The problem on the designers end: it's not a linear ramp in dark to light visually. This usually goes unnoticed in a cross-disciplinary scenario unless you're really going deep into color, designers are used to working under eng. constraints.

- Color space accuracy / blue and yellow gradient:

It's a warning sign, not a positive sign, if a color space _isn't_ gray in the middle of a blue to yellow gradient. They're opposites on the color wheel and should cancel out to nothing. Better to instead note the requirement that you don't want gray gradients, and to travel "around" the colorspace instead of "through" it, i.e. rotate hue to make the gradient, travelling along the surface of the colorspace, rather than going into the color space, reducing colorfulness.