It could just be the shadow from turret two guns, but it looks like maybe they painted turret number one with 5-L or something like a flat version. It still would have been too light. The idea of painting a darker contrast ID marking was one of the suggestions. In any USN evaluations of alternatives, there were always different parties involved with different view points. The scout/spotter crews wanted to be able to positively ID their ship and certainly didn't want to give up the markings.
But, the point was as early as May 1941 they knew that these ID markings were going to be a problem for reducing visibility from aerial detection. It would make sense that if they were experimenting with deck paint to reduce aerial detection, that going after the other major contributors made sense. Even if it was on only one of the battleships. The fact that the ID markings (painted turret tops) quickly disappeared after the attack points to that understanding.
The NEVADA and PENNSYLVANIA classes had an additional problem because of the arched design of their turret tops. The turret top ID paint could be seen from surface observations as well as aerial.
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: ...to me both tops look very white.