+xMGS Hexiom L285 is a good product, I've used it before because it is one of very few resins that are approved for use on gliders. The blue colour is a tint they use so you can see it has been mixed properly. Once mixed, it is a very light shade of blue that you won't be able to see on carbon unless it is extremely resin rich.
Thanks hanaldo, you have experience with this resin and that gives me positive idea