Ironclad Sea Blue Base Shades

I need to match this using Vallejo colours

This is my previous basing for the dark sea cloth...too grey!

I'm on the way back home over the next couple of days but have been thinking ahead, so that I can squeeze some wargaming into the last couple of days of holiday time. One thing I need to do is pick up and finish off my 1/2400th scale French ironclads including repainting the sea bases to match my new Tiny Wargames blue sea terrain cloth. At the moment, they are blocked in with a blue/grey shade to match my other sea cloth which is a darker colour. I wasn't very happy with this as it looked a bit too grey but it has left me with the challenge of finding a colour match using Vallejo or Army Painter shades for the new blue cloth. Any suggestions for a good three stage approach that works would be very welcome!