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    <p>Due to the fact, that the <a href="http://msdn.microsoft.com/en-us/library/14w97wkc.aspx"><code>Color</code></a> structure already has a <a href="http://msdn.microsoft.com/en-us/library/system.drawing.color.gethue.aspx"><code>GetHue()</code></a>, <a href="http://msdn.microsoft.com/en-us/library/system.drawing.color.getsaturation.aspx"><code>GetSaturation()</code></a> and <a href="http://msdn.microsoft.com/en-us/library/system.drawing.color.getbrightness.aspx"><code>GetBrightness()</code></a> it would be nice to also construct a color from these values. So i found the following code somewhere on the net a while ago (currently can't find it again, but it was from a Microsoft guy blog and he also had a test that steps through all <a href="http://msdn.microsoft.com/en-us/library/system.drawing.knowncolor.aspx"><code>KnownColor</code></a>).</p> <pre><code>/// &lt;summary&gt; /// Creates a Color from alpha, hue, saturation and brightness. /// &lt;/summary&gt; /// &lt;param name="alpha"&gt;The alpha channel value.&lt;/param&gt; /// &lt;param name="hue"&gt;The hue value.&lt;/param&gt; /// &lt;param name="saturation"&gt;The saturation value.&lt;/param&gt; /// &lt;param name="brightness"&gt;The brightness value.&lt;/param&gt; /// &lt;returns&gt;A Color with the given values.&lt;/returns&gt; public static Color FromAhsb(int alpha, float hue, float saturation, float brightness) { if (0 &gt; alpha || 255 &lt; alpha) { throw new ArgumentOutOfRangeException("alpha", alpha, "Value must be within a range of 0 - 255."); } if (0f &gt; hue || 360f &lt; hue) { throw new ArgumentOutOfRangeException("hue", hue, "Value must be within a range of 0 - 360."); } if (0f &gt; saturation || 1f &lt; saturation) { throw new ArgumentOutOfRangeException("saturation", saturation, "Value must be within a range of 0 - 1."); } if (0f &gt; brightness || 1f &lt; brightness) { throw new ArgumentOutOfRangeException("brightness", brightness, "Value must be within a range of 0 - 1."); } if (0 == saturation) { return Color.FromArgb(alpha, Convert.ToInt32(brightness * 255), Convert.ToInt32(brightness * 255), Convert.ToInt32(brightness * 255)); } float fMax, fMid, fMin; int iSextant, iMax, iMid, iMin; if (0.5 &lt; brightness) { fMax = brightness - (brightness * saturation) + saturation; fMin = brightness + (brightness * saturation) - saturation; } else { fMax = brightness + (brightness * saturation); fMin = brightness - (brightness * saturation); } iSextant = (int)Math.Floor(hue / 60f); if (300f &lt;= hue) { hue -= 360f; } hue /= 60f; hue -= 2f * (float)Math.Floor(((iSextant + 1f) % 6f) / 2f); if (0 == iSextant % 2) { fMid = hue * (fMax - fMin) + fMin; } else { fMid = fMin - hue * (fMax - fMin); } iMax = Convert.ToInt32(fMax * 255); iMid = Convert.ToInt32(fMid * 255); iMin = Convert.ToInt32(fMin * 255); switch (iSextant) { case 1: return Color.FromArgb(alpha, iMid, iMax, iMin); case 2: return Color.FromArgb(alpha, iMin, iMax, iMid); case 3: return Color.FromArgb(alpha, iMin, iMid, iMax); case 4: return Color.FromArgb(alpha, iMid, iMin, iMax); case 5: return Color.FromArgb(alpha, iMax, iMin, iMid); default: return Color.FromArgb(alpha, iMax, iMid, iMin); } } </code></pre> <p>With this function you are able to work within the HSB (or HSV) color presentation <strong>not</strong> within the HSL presentation. For further informations about their differences take a look at <a href="http://en.wikipedia.org/wiki/HSV_color_space">this wikipedia article</a>.</p>
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    1. COThanks. I will workout on this.
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