Finding hue information

Could you please post a screenshot with the pertinent Panels (Layers, Channels, Options Bar, …) visible?

Just to make sure whether you might be talking about Solid Color Layers etc.

Hue information is held by pixel on a layer not just the layer.

Use the eyedropper tool and in the options bar set Sample size to at least 5x5 to avoid being thrown off by any variation due to noise. Then set sample to current layer.

Select the layer move the eydropper over the area to sample and either read the values in the Info panel (set it to HSB and read H) or click to set the colour as your foreground colour.

Dave