Nino
Here is a site with info on measure 22 camo:
So, this is not the correct Measure 22 to use for Indianapolis if you want to build her *as sunk* you need to do the 1945 version of Measure 22 - from the same site:
Essentially, by 1944 the Navy had figured out that it wasn't the color that waas important as much as it was the tone of the paint (light, medium, dark). There was more need for the ultramarine blue pigment necessary to make the purple-blue based colors
than there was supply, so the Navy decided to
go to neutral paints.
There was such a large stock of blue paints in the fleet that it's hard to say when a specific ship might have repainted in the neutral colors, however it is safe to say that by July of 1945 Mare Island Navy Yard, which was the Navy's West coast paint manufacturing yard, would have been painting ships in the neutral colors.
So Indianapolis would likely be in (neutral) #7 Navy Gray, (neutral) 5-H Haze Gray, and #20 Deck Gray on her decks. This was ordered for the Pacific fleet in
February 1945 There is a small chance that Mare Island would still have stocks of 5-N Navy Blue left and of course it's totally up to the model builder to build as they want so it's not a 100% sure thing, but it's likely that she was in Neutral grays when lost.
Mission Model Paints has a couple of the colors in their acrylic line, I know there are more but I'm out of time for tonight.