The DMC Colour Chart by Yarn Tree will help you see the colours that have been selected for your design. If there are any other colours you feel would work better, simply note the DMC Floss number.
DMC Floss Colours
Yarn Tree "DMC Colour Chart" - Website
The Lord Libian "Find the Perfect Skin Tone" will help you select a skin tone that you feel best reflects the subjects in the piece. As a reference, DMC 951 is the colour I use for Mario, Luigi and Princess Toadstool in my Mario 3 pieces.
DMC Skin Tones