The following feature requests are already open for votes and comments:
HSL Hue values as well as slider - DxO PhotoLab / Feature requests - DxO Forum
HSL Wheel - numeric readout for outer ring - DxO PhotoLab / Feature requests - DxO Forum
Each of these covers part of what this topic is asking for, but not the whole package. I’ve changed the present topic category to a feature request so that votes may be tallied. Vote for it if you want what is being proposed.