Is there a plugin that can let Photoshop use a HSL color picker, rather than HSV (which Adobe calls HSB)?
In other words, any/all of the following locations could have an HSL option:
Or perhaps a plugin with it's own color picker.
Reference
RGB HSL HSV (aka HSB)
============= =============== ================
(1, 0, 0 ) ( 0°, 1, 0.5 ) ( 0°, 1, 1 )
(0.5, 1, 0.5) (120°, 1, 0.75) (120°, 0.5, 1 )
(0, 0, 0.5) (240°, 1, 0.25) (240°, 1, 0.5)