How do I change color's hue, saturation, or value in Flutter?

You can use these helper methods to change it. Just replace

• newHueValue: with any double btw 0 and 360
• newSaturationValue: with any double btw 0 and 1
• newLightnessValue: with any double btw 0 and 1

Color changeColorHue(Color color) => HSLColor.fromColor(color).withHue(newHueValue).toColor();

Color changeColorSaturation(Color color) => HSLColor.fromColor(color).withSaturation(newSaturationValue).toColor();

Color changeColorLightness(Color color) => HSLColor.fromColor(color).withLightness(newLightnessValue).toColor();

Similarly you can use: HSVColor for HSV (hue, saturation, value).

more: https://api.flutter.dev/flutter/painting/HSLColor-class.html