Sigma FP User Manual page 92

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In SIGMA Photo Pro, Monochrome mode is designed for DNG data

capture using MONO. Sigma Photo Pro can convert Monochrome DNG
images into color. (JPEG data cannot be returned to a color image.)
CAUTION
In MONO. (Monochrome) mode, if an option other than [B/W] (B&W) is

selected for [Toning Effect] in [COLOR MODE DETAILED SETTING]
(next section), you can adjust the effect.
When developing DNG data with an Adobe Systems application, the

color mode settings may not be reflected depending on the version of the
application. Please check the up-to-date information.
COLOR MODE DETAILED SETTING
With each color mode, image parameters (Contrast, Sharpness, and
Saturation) can be adjusted to create preferred images.
Contrast
Contrast can be increased by moving the cursor to + side, or decreased,
preserving image detail, by moving the cursor to - side.
Sharpness
It is possible to make the pictures appear sharper, by moving the cursor to +
side, or softer by moving the cursor to – side.
Saturation (Except Monochrome)
It is possible to increase saturation thus making pictures appear vivid, if the
cursor is moved to + side. Moving the cursor to – side, decreases saturation
and makes images less vivid.
Toning Effect (Only with Monochrome)
Monochrome images can be finished with preferred color tones.
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The selected color setting icon is displayed.