What is this bug I just caught?

I just caught something that was crawling up the wall of my office. It’s about 1½ inches long, slender, about ⅓2 of an inch wide, with long antenna, and 14 legs on each side. The legs get progressively longer as they go down the body. The front ones are a little over ¼ inch and the back ones are almost an inch long. It’s light gray almost cream colored. I don’t have a camera.