U-581 Decal color help please...

Thanks! That's what I thought. I had never read anything about red hulls but figured I better ask.  

I'm sure I can paint the bug but - how can I make the U 581 decal?

EDIT: I found a jpg of the bug on the net. Blue circle, black bug. Wondering if that can be "printed" to decal material?

Link: http://www.u-historia.com/uhistoria/historia/huboots/u500-u599/u0581/u581.htm

No wartime color photos have ever shown U-boats to have a red lower hull. The most common color was Dark Gray RAL-7021, which had been treated with anti fouling chemicals to inhibit marine growth.

I can not offer any help with the ladybug thing except to suggest trying standard red and black colors for that and hand paint it yourself. Perhaps try using a sharpened toothpick for more precision.