Hmmm, I doubt you are using the default, although I may have made changes over all this time using Audacity, that my settings are no longer fully default either.
Here are my settings for the Spectogram shown:
All I did was change the view to ‘Spectogram’ by clicking on the dropdown of the audio file after loading it into Audacity. I then made a region selection using my mouse + drag to select a frequency range (in the frequency bar to the left of the audio view).
You can also select a specific range in the ‘Spectogram Settings…’ window of course. You can get to that menu once in Spectogram view mode, by clicking on the drop-down of the audio file and select ‘Spectogram Settings…’. Or you could just left click the mouse in the desired frequency range a couple of times, to zoom-in at that frequency, until the desired zoom level is reached. You will notice your mouse cursor change to a magnifying glass when hovering over the frequencies shown to the left of the audio view. Right-click will zoom out again.
Actually, I just noticed that I did change the ‘Window size’ to ‘32768 - most narrowband’, instead of using ‘1024-default’. This will result in a clearer image as it affects how much vertical (frequency) detail you see. The higher this value, larger FFT window size (Fast Fourier Transform), the more low frequency resolution and less temporal resolution.
Other than that, you are in ‘spectral edit mode’ with the full audio selected, which changes the colors in this case to green/blue shades for selected parts. Not sure if spectral edit is enabled by default. Give frequency region selection a try and disable spectral edit mode, or make no selection.