Your photos too small for me to see clearly, if I enlarge them - blurry and I still can't get a clear view of the leaves. Can you post a better/larger photo or at least describe what you are seeing. All I can guess is that they look a little yellowish but I can't make out any detail to know for sure that a nutritional deficiency might make more sense than a fungal disease. Another guess to color very off could be lace bug, but without being able to see the leaves, just guessing.

The photos do lack clarity, but suggest a pretty serious infestation of lacebugs, as morz8 noted, rather than any sort of fungus. Check the underside of the leaves. Lacebug nymphs leave characteristic excrement in the form of dark brown spots. It is pretty early for lacebug activity, but perhaps not in your area. It is important to treat now as lacebugs are capable of producing many generations over the course of the summer. Insecticide soaps are safe and effective, but must be applied frequently. Your county extension seervice can suggest stronger possibilities with residual action suitable for your area.