Looking at the box art I can understand why you used the color you did. The khaki does appear to be on the yellow side.
Box art can be deceiving. I don't know who Tamiya's box artist was in the 1970s but some of their artwork was beautiful. The artist seems to have been influenced by impressionism and the Flemish landscape painters of the 1600-1700s. Tamiya's first Tiger I box is still one of my favorites.
Look at it and you will see that the tank is painted in medium shadow and bright light, colors being predominately a deep blue-green. On the sunny surfaces the panzer yellow is more of a light olive hue, and the greens are a muted Hooker Green. What makes it interesting are the violets and oranges used in the tracks and road wheels, plus the lime and grass greens used to demarcate the rubber rims of the road wheels. Personally, I'd love to have a large copy of this art on my wall!
None of that really matters except to demonstrate how box art is not always a good guide for painting and yet sometimes, it is the only guide a modeler has. Sometimes the box art is painted with more of an artistic eye-catching style than to be a color guide.
So be proud of your model.
BTW, what Tamiya color did you use on the figures?