HSV/HSB Color picker for Widgets

Ok, here is my understanding what HSV picker is.

It allows me to select:

  1. Hue
  2. Saturation
  3. Brightness / Value

In the RP 9 Promo material, you have mentioned enough that it is HSV. But what i see in RP9 Interface is RGB Picker NOT HSV/HSB

However, i fail to find the picker for Value / Brightness and please be informed that i do not want to use Transparency / Opacity.

Opacity / Transparency can get me a visual hierarchy i want with colors, But, when the widget is above any other widget. The transparency/opacity causes issue.

To be More explicit, please look at below screenshot.

Also, point it out to me if this can be achieved or this is hidden somewhere due to the new minimalism.