I'm sure GMorrison's evaluation of White Ensign paints is quite valid. The gents who mixed up those colors were real enthusiasts who knew exactly what they were doing.
The problem is that the original, British White Ensign Models company went out of business a few years ago. An American company took over the photo-etched fittings and resin ship kits, but not the paints.
The White Ensign Colourcoats paint line was taken over by another British firm, Sovereign Hobbies. It offers a huge range (over 400 colors, though I have no idea how many are actually in stock at any given moment), including sets designed for particular ships. The Sovereign website advertises an "HMS Hood as sunk" set as "Coming Soon." Here's a link: https://www.sovereignhobbies.co.uk/collections/colourcoats-sea/products/hms-hood?variant=12904983108 .
You could buy the individual colors as well: https://www.sovereignhobbies.co.uk/collections/colourcoats-sea/british . Unfortunately there are two problems. One - Sovereign Hobbies doesn't do mail order business outside the United Kingdom. A note about halfway down the page I just linked says, "Please Note - We are unable to post Colourcoats Paint outside of Mainland UK. Please see our "Where to buy" for international orders." I looked pretty hard for that "Where to buy" page, but couldn't find it. Maybe some other Forum member knows: does some American retailer stock Sovereign Colourcoats paint? (I'm assuming - perhaps incorrectly - that Rangatoon lives in the U.S. If I'm mistaken, I apologize.)
The other problem is that these paints are enamels. That means they thin with turpentine or mineral spirits, rather than water - and they stink, to the point of giving some people (like me) headaches. Enamel paint is wonderful stuff, but it handles differently than acrylics and, generally speaking, takes longer to dry.
Another approach would be to order a set of Snyder and Short color chips: http://shipcamouflage.com/royal_navy1.htm . With those chips in hand, you can mix up matching colors in whatever paint brand you like. Snyder and Short do send stuff to American addresses.
Another, considerably less precise (but more practical) approach would be to print out the color samples on the Sovereign website on your printer, and match your colors to those. The purists will tell you that isn't a good way to do it, and they're right: all sorts of things happen to colors between the time the artist paints them and the time they come out of your printer.
But my contention is that those samples will give you a pretty close approximation of what you want - and, as I said back in 2008, that's actually the best you can hope for.
Good luck.