using System;
using System.Drawing;

/*
* Helper class for color calculations.
*/
static class ColorUtil
	{
	static public float GetLuminance(Color c)
	{
		return ((c.R * 0.2126f) + (c.G * 0.7152f) + (c.B * 0.0722f)) / 255.0f;
	}

	static public string ToHex(Color c)
	{
		return "#" + c.R.ToString("X2") + c.G.ToString("X2") + c.B.ToString("X2");
	}

	static public Color TimeToColor(DateTime time)
	{
		int r, g, b;

		r = time.Hour * (255 / 24);
		g = time.Minute * (255 / 60);
		b = time.Second * (255 / 60);

		return Color.FromArgb(r, g, b);
	}
}