1. A machine-implemented method for enhancing a saturation contrast of a digital image, the machine-implemented method comprising: converting, by a digital imaging tool, an original color space of a digital image to a second color space having a saturation channel; applying a saturation contrast enhancement to original saturation values of the saturation channel, based, at least partially, on at least one user-provided parameter to produce enhanced saturation values, the at least one user-provided parameter including a magnitude value representing a strength of a saturation effect, the applying a saturation contrast enhancement further comprising: computing saturation statistics of the digital image, the saturation statistics including a median saturation value of the digital image, computing an s-curve based, at least partially, on the at least one user-provided parameter, a position of an inflection point of the s-curve being based on the median saturation value, and producing the enhanced saturation values based on the original saturation values and the computed s-curve; converting, by the digital imaging tool, the second color space, including the saturation channel with the enhanced saturation values, to the original color space; and outputting or saving, using the original color space, a saturation-contrast-enhanced digital image, the saturation-contrast-enhanced digital image being based, at least partially, on the enhanced saturation values of the saturation channel of the second color space.