I've been slogging through these for a while - those in the Thayer system and the late war carriers are based on colour photos I've managed to dig up, as are the carrier deck markings. The rest I've just stuck with good old grey. 1/3000 isn't exactly condusive to detail 
Still got all my cruisers, destroyers and subs to go.
Independence, Ranger, Lexington, Wasp, Essex, Yorktown and Midway
Lexington and Saratoga as they would've been before conversion, and the Alaska and Guam
Iowa, Missouri, Alabama, South Dakota, Indiana, Washington, Nevada, California, Maryland and Texas
Handy link for those painting US vessels; the USN painting regs and colour palettes: http://www.steelnavy.com/usnchips.htm

Still got all my cruisers, destroyers and subs to go.

Independence, Ranger, Lexington, Wasp, Essex, Yorktown and Midway

Lexington and Saratoga as they would've been before conversion, and the Alaska and Guam

Iowa, Missouri, Alabama, South Dakota, Indiana, Washington, Nevada, California, Maryland and Texas
Handy link for those painting US vessels; the USN painting regs and colour palettes: http://www.steelnavy.com/usnchips.htm