_EdgeColor
rgb_color _EdgeColor(const rgb_color& base,
edgeLightColor = _EdgeColor(defaultIndicatorColor, false, flags);
edgeShadowColor = _EdgeColor(defaultIndicatorColor, true, flags);
edgeLightColor = _EdgeColor(background, false, flags);
edgeShadowColor = _EdgeColor(background, true, flags);
rgb_color edgeLightColor = _EdgeColor(base, false, flags);
rgb_color edgeShadowColor = _EdgeColor(base, true, flags);
rgb_color separatorLightColor = _EdgeColor(separatorBaseColor,
rgb_color separatorShadowColor = _EdgeColor(separatorBaseColor,