As you know - HP gives you an amazing palette of all colors your horse can be (ie Dunalino, bay, black, red/strawberry/blue roans, buckskins, etc.) and starting with a pair is the easy part! Though this came to mind; How would you know about the foal's color? There is a calculator in real life that allows you to pick certain colors to tell you the percentage of the baby's coat at birth, but for me, this is a problem. Reading a color calculator is like reading html coding, I can't understand it! 

Recently I bred Calahari II (who is a bay and due to his picture I would consider him a blood bay) x Lady Liberty (Who is either possibly a fleabitten grey or a dapple grey), who gave birth to a colt named Sir Lucentio I. I love to do anything I breed/raise in a realistic standard, so here's why I need help - If the Sire is a blood bay and the dam is fleabitten/dapple grey, what would the foal's coat color be? 

I would also like to point out before I'm told, "Use a horse calculator they'll help", I have already. The problem is grey (Which is the color of my dam) is not a trait list for an offspring's coat - There is bay but nothing else. I had also found a second calculator with colors but it was talking in percents and letters like: "Ee - Homozygous black%" or something like that, in either case it was hard to me!  

Is there any easy way to tell a foal's coat color at birth or an easy calculator to use? Please help and let me know! 

IMO, gray is usually a dominant color, so with the sire being a blood bay, and the mare being a gray, either dappled or fleabitten, I would still have to say it would be gray.

http://www.animalgenetics.us/CCalculator1.asp

http://www.examiner.com/article/color-genetics-what-color-will-your-next-foal-be explains the Ee's and stuff.

http://www.horsetesting.com/ccalculator1.asp

Just to add to the links that have been posted...

Grey is a modifier, so it works on the basic coat colors.  For example, a horse is born bay, but the gray modifier causes them to grey as they age.  It is dominant, so only one parent needs to be grey for the offspring to be grey.  This is why some people deliberately keep grey horses out of herds, because that modifier will work on any coat color and turn the horse grey.  Typically when we see "steel grey" or "rose grey" we are looking at a young horse who has not fully greyed-out.  Hope that helps with grey!