Knitting chart help

[morrene]

I downloaded a picture of the Chicago Bears logo, then went to microrevolt.org/KnitPro to get a grid pattern so I can knit it into a sweater for my grandson. My problem is that there are more different colors of squares in the grid than in the picture. The picture has only white, navy and orange, but the grid has two shades of blue, 2 of orange, and several of gray. (pictures attached.) This is my first try at a chart - please help. Thanks.