Trying to stash and vendor loot with PixelSearch; best color to use?

[Simonzi]

Due to using a unique resolution, I can't use most of the mainstream scripts. I was keeping up with modifying notAres' script to work in window mode, but once he started using ImageSearch and .pngs with 1.3b, I haven't been able to. So I've been stuck with his old 1.3a script, which I've been modifying quite a bit. Anyway, I've been trying to add the ability to stash my rares\legendaries\sets, and vendor my blues. Stashing works fine using just 0xFFFFFF, which it picks up from the ? in the center, as well as the white border if I happen to accidentally grab some whites. But vendoring blues... I can't find a good pixel color to use. I've tried using various blue ones on the background, but it seems to be slightly different between blues. Any suggestions?