I'm using iterm2 (v3.0.14) on Mac Sierra. How do I invert the color scheme on my terminal? That is, right now, the default is a black background with white lettering, and I would prefer a white background with black lettering. Note that I don't want to invert the color scheme for everything on my Mac (which I can do with a keyboard shortcut), I only want to invert the color scheme for iterm2.
If I understand you correctly, you want to change the color theme.
preferences>profile>colors>color presets, choose the scheme or import the scheme you download.
Or you can double click the .itermcolors files, then go preferences>profile>colors>color presets to find your scheme.
If you just want to change the background color and font color, it's more easy. Just adjust the color on preferences>profile>colors.