GetColorFromHex

var color = Application.Current.Resources["SystemAccentColor"];
var accent = ColorHelper.GetColorFromHex(color.ToString());

ColorToUInt

var colorInt = ColorHelper.ColorToUInt(Colors.Red);

GetHexFromColor

var hex = ColorHelper.GetHexFromColor(Colors.Red);

GetSolidColorBrush

var solidBrush = ColorHelper.GetSolidColorBrush(hex);

LightenColor

Tints the color by the given percent.

Color ColorHelper.LightenColor(color, percent);

DarkenColor

Tints the color by the given percent.

Color ColorHelper.DarkenColor(color, percent);

GetColorFromHsl

Converts the HSL values to a Color.

Color ColorHelper.GetColorFromHsl(alpha, hue, saturation, lighting);

GetBrightnessFromColor

Gets the brightness of the color.

float ColorHelper.GetBrightnessFromColor(color);

GetHueFromColor

Gets the hue of the color.

float ColorHelper.GetHueFromColor(color);

GetSaturationFromColor

Gets the saturation of the color.

float ColorHelper.GetSaturationFromColor(color);

GetInterpolatedColor

Color color = ColorHelper.GetInterpolatedColor(progress, startColor, targetColor);

Demo

you can run demo and see this feature.