I gotta ask - do you always tuck your shirt in? I really don't at this point, so I never wear belts (unless I'm wearing a suit or something, obviously, in which case I both tuck and wear a belt). I try to size my jeans so they'll stay up without one. If I did wear a belt, it wouldn't serve a function, and it would only be visible inasmuch as it would create an unsightly bulge at my waistline.
belt is less about being visible, but more as a means to accessorize, even if you nv tuck your shirt in.
instead of getting thick leather cowhide tanner unlucky, you can get those paper thin $5 h&m "leather" belt.