HSL color wheel

hi there, i’d like to have another colour wheel which has 50% gray at its center.
like this:
the reason is simple:
when you mix two complementary colours, you get 50% gray. the colour wheel above simulates that behaviour.

i do understand that our current RGB colour wheel offers full control over HSV model: angle is hue, distance from center affects saturation and the slider below controls value.
however, the issue with center being gray can be solved by making the slider below colour wheel not V but L. that would ensure users can always go from full black to full white.