OK, Porpoise boat, Submarine School. Let's do this first:

I have used the menu buttons below to get to the Observation Periscope station.
I am looking at 000° just after it came up. Notice the lamps on the menu (Commands)
buttons, and notice the color of the gradation lines in the scope.
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Now the Attack Periscope - similar look, but notice that I have turned the Attack scope
to 180°, and I am seeing the sub's rooster tail. Notice the color of the gradations, and notice
the lights on the menu (Commands) bar below. Notice that I still have the Observation Periscope
up? You can tell by the button lights.
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So now, let's say I go to my NavMap view and I lower my Attack Periscope, since I'm not going to use it. I change my course or whatever, and I want to go back to that Observation Periscope view real quick, so I hit the <F3> key (it is a periscope button, after all), and I get this:

Whoops! I'm back at the Attack scope... notice the 180° marking above, and the color of
the gradations? Notice that the Attack scope station button light is lit, not the Observation,
though the Observation scope shows up. Use the <O> ("oh!") key instead (or just use the menu
buttons again) to get to the Observation scope.
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Is that maybe what the issue is? Or do you maybe have something "whiter"?