This tool is accessible via main menu > Objects > Color in selection / transformation mode.
The Tune Colors feature allows you to adjust the colors of all selected objects, or even the entire design at once. The Tune Colors command opens a window with Brightness, Contrast, Gamma, Saturation, and color balance controls (Cyan-Red, Magenta-Green, Yellow-Blue). These controls work with the color of vector objects and stitches (thread), not with the image colors.
Left: original colors before tuning. Right: brightness increased for all objects at once.
Adjusting color using the yellow-blue, red-green, and cyan-magenta balance tools means modifying the proportion of these complementary color pairs in your design.
Knowing how these color pairs influence each other is essential for achieving the desired look.
These balance adjustments can be applied separately to shadows, midtones, and highlights, giving you more precise control. Rather than affecting the entire design uniformly, you can fine-tune colors in the darker areas (shadows), the mid-range tones, and the brightest parts (highlights) independently for more refined color correction.