DarkNight asked me to design a foal for Ice x Dark Night. Since they're both black based I didn't have much variety to choose from, and since foals aren't born light grey I didn't want to make a grey design. However, there's a grey foal in the film, so it's not unreasonable to make dark grey foals on Spirit source.
Taking this into account I made two possible foal designs. The one on the left is black, with an irregular star and one brown eye, one blue eye, after each parent. This foal has the potential to grey out as it ages, although it doesn't have to.
The one on the right is a grey foal inspired by the one in the film. It has grey goggles and grey around it's nose, often the first sign that a foal will grey out when it gets older. This foal WILL get lighter as it ages. It has brown eyes, it's father's star and it's mother's white spots on it's back.
DN, you can have either foal you want, or both.
Grey foal from film: http://i1.wp.com/screencaps.us/200/2-spirit-stallion-cimarron/full/spirit-stallion-disneyscreencaps.com-713.jpg
Grey goggles:http://www.whitehorseproductions.com/images/horsecolor/greys/grey_goggles.jpg
Ice (c) me
Dark Night (c) Darknight
Blank render (c) ariukas on dA