My 135% has a white sail cover
that is almost the exact same color as the sail. Unless you look hard from a few feet away it appears the sail has no UV strips.
An observation, that you did not ask for😊, is that I have come to prefer the more "Normal" dark blue stripe. Why? One for the above mentioned getting dirty, but more for being able to see that the fuel
is tight and does indeed cover the white sail cloth completely. I also suspect, wrongly perhaps, the darker color is a better UV block.
There are other fabrics than Sunbrella that seem to work