Desaturation
Reduce color intensity so that tone, texture or a small amount of retained color can take greater visual priority.
Prompt
Reduce overall color saturation to about one quarter of the original, while retaining the existing crimson jacket at a restrained roughly half of its original saturation. Preserve dark skin luminance, midtone detail, the jacket's exact graphics, blue-jeans texture and subject-background separation. The result is muted color with one modest red accent, not a darker exposure and not a fully monochrome cutout.
Text: fuse technique research · Examples: imagery generated in-house at fuse (Characters: Pi · Setting: Courtyard with low walls)
Other techniques
Color TemperatureDescribe a light's warm or cool character in relation to white balance and the other sources in the scene.Mood
Edge LightCreate a narrow line of light along the edge of a figure or object to separate it from the background.Portrait
Forced PerspectiveUse distance and alignment within the frame to make objects of different sizes or at different depths appear to have another scale relationship.Visual Effects

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Effect comparison
In the baseline image, Pi's red coat, blue trousers and the courtyard each have distinct colors. Desaturation restrains the overall palette, bringing the stone walls and paving closer to gray and making the red coat less intense. With less stimulation from color, the figure's pose and tonal relationships become more prominent, giving the scene a quieter appearance.
Without technique
With technique