Need help setting a texture background to a container div

I'm fairly new to development, and i'm trying to set a texture background to a container div. My CSS is below.

.container {
background-image: url(..img/texture-one.png) repeat;

}

My problem is, the image isn't showing up. If I make an img tag in my html, the image shows up using the same path. Sorry if this questions sounds stupid, i'm still learning and would much appreciate the help! Thanks!