Read this advice before re-roofing and rain gutter installation.

Good advice, I think.

Do they come already in brown?

If the roof doesn't need new shingles, wouldn't it be possible to shorten the strap to an inch or two under the shingles, then lift the shingle (if it's not yet too brittle) to put a nail in, top with a metal plate and hammer on the shingle/plate/nail, using the plate to keep from breaking the shingle.

Even one nail only an inch from the edge ought to be enough to hold the gutter up for 10 or 20 years, no? Since the force on the nail will be perpendicular to it, parallel to the roof.

I've done a lot of weirdo things like that and they usually work.

I went 25 years on my first shingles and asked the roofer to hammer in the gutter spikes when he was up there, but he didn't' suggest these strapped hangers. He did everything else I asked, but without having watched, I can't tell if he did this. It wouldn't have mattered because soon after the spikes on the south side of the house were lose and I replaced them all with gutter screws. They held well, but there may be sagging again 6 years later. The gutters on the north side of the house are fine, I think. I looked at them to replace the spikes with screws, and I don't remember if I did it or not, but if so, they were pretty tight already and I figured screws are bound to be better than nails.