Bug 152430 Key can modify to empty string
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/CustomColorHandle.java
* @param displayNameID
	 *            the resource key for display name
	 */
	public void setDisplayNameID( String displayNameID )
	{
		setPropertySilently( CustomColor.DISPLAY_NAME_ID_MEMBER, displayNameID );
	}
	/**
	 * Returns the custom color name.
	 * 
	 * @return the custom color name
	 */
	public String getName( )
	{
		return getStringProperty( CustomColor.NAME_MEMBER );
	}
	/**
	 * Returns the color value as what the user has input.
	 * 
	 * @return the color value as what the user has input.
	 */
	public String getColor( )
	{
		return getStringProperty( CustomColor.COLOR_MEMBER );
	}
	/**
	 * Sets the color value.
	 * 
	 * @param colorValue
	 *            the color value to be set.