Dirty/dark suzuki coolant

I noticed today that my coolant has turned pretty dark blue. I hit it with a flashlight and it's still somewhat blue but the deal is there isn't any water in my oil. Has this happened to anyone else? I've used engine ice in the past and I can't recall it getting dark or changing colors. I am going to drain it but I'm wondering if this particular coolant is supposed to get darker or not. It doesn't make a whole lot of sense that there would be anything wrong if A) the level is correct B) no water in oil and C) nothing comes out of the weep hole. I put on a cv4 cap a few months ago, would that have anything to do with it? Let me know what you think. In addition when I change my oil I measure what comes out of my bike to make sure I have gotten everything. Nothing extra is there. 1100 every time. Thanks

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