I am trying to lower the point where the col-lg- classes switch to the col-xl-classes because I'd like to have more control on the 1600-1980 width screens. Right now it just switches from col-md- to col-lg-, but I'd also like to use the col-xl- for the 1900+ width screens.
I'm using JS/CSS only (no SASS or LESS), so I'm looking for the points where those widths are set.