In addition to adjusting Saturation, Contrast and Brightness, you can also adjust Hues for both the Edge and the Foreground. You can either adjust hues numerically , by scrubbing the Hue slider (under Color Balancing), or you can twirl open Color Balance Wheel and click anywhere on the wheel to pick a new color. The foreground (or edge) will become tinted with the color you pick.
If you adjust the slider (rather than the color wheel), nothing will happen at first, because the Sat value is set to zero by default, meaning totally desaturated (no color). You'll have to raise the Sat value before you can add a hue tint.