Invokes platform specific functionality to allocate a new color.
<p>
<b>IMPORTANT:</b> This method is <em>not</em> part of the public
API for <code>Color</code>. It is marked public only so that it
can be shared within the packages provided by SWT. It is not
available on all platforms, and should never be called from
application code.
</p>
@param device the device on which to allocate the color
@param gdkColor the handle for the color
@param alpha the int for the alpha content in the color(Currently SWT honors extreme values for alpha ie. 0 or 255)
@noreference This method is not intended to be referenced by clients.
Invokes platform specific functionality to allocate a new color. <p> <b>IMPORTANT:</b> This method is <em>not</em> part of the public API for <code>Color</code>. It is marked public only so that it can be shared within the packages provided by SWT. It is not available on all platforms, and should never be called from application code. </p>
@param device the device on which to allocate the color @param gdkColor the handle for the color @param alpha the int for the alpha content in the color(Currently SWT honors extreme values for alpha ie. 0 or 255)
@noreference This method is not intended to be referenced by clients.