There's always a bit of fudging when it comes to how CV 6 appeared at Midway. And the question has everything to do as to when Measure 11 changed to Measure 21. 5-S Sea Blue was a lighter color, but weathered poorly. ADM King called for all ships painted with 5-S paint be repainted in 5-N blue in late '41-early '42.
When I did my Yorktown, research indicated that her three-tone measure 12 camo was applied at Norfolk, prior to her returning to the Pacific, the 5-S paint wasn't used. She was painted in 5-N on the lower hull below the hanger deck.
The few photos of CV 6 taken in and around Spring 1942, show her in a dark paint, so most researchers agree that while she was listed as painted in Measure 11, she would have been painted in 5-N Navy Blue. She was in 5-N during the Solomons and would have stayed (although weathered alot) in that scheme until her Spring-Summer '43 refit. She came out of the yard in Measure 21 then.
She wore a splinter paint scheme briefly, then returned to Measure 21 to end the war.
Added to the paint scheme questions, there are the installation of the 40MM Bofors guns and the change from the .50 cal machine guns to 20MM cannons time frame mixed in there.
As Scott said earlier, the Ark might be easier.