In the Mandrake daily strip of 22 Jan '05 (check it out from my website), the colour of Mandrake's eyes is shown as light blue. I always thought of him having dark coloured eyes (either very dark brown or black). Is there any official eye colour (I mean a colour usually used for his eyes)?

Also, as I read somewhere, Mandrake was modeled to quite an extent on Lee Falk himself, so I wanted to ask what was Lee Falk's eye colour? Just out of curiosity.