So the short answer is: if your Shark Sauce is between a pale yellow and a mid-range orangey-brown, it is normal. It did not go bad.
The long answer is a little, well, longer: We try to be as responsible as possible with our products, and we take the process very seriously. We order our ingredients in small quantities, and make our products in small, regular batches to ensure that everything is delivered to our customers as fresh as possible. We also use everything in very high concentration. Where a product might typically use a tiny drop of green tea extract, for example, we use 1%, which for our supplier, is the maximum suggested usage rate.
On top of this, we do not use any colorants or fragrances to mask the ingredients' natural appearances or scents, to minimize irritation risks to customers with more sensitive skin. Because of this, any variation between batches becomes much more obvious. Shark Sauces that we produce during cooler weather tend to stay a much lighter yellow, whereas Shark Sauces produced during warmer weather tend to darken slightly and take on a more orangey-brown tone. This is due, in part, to the green tea extract (which can look either completely clear or the color of a weak tea), and in part to the high concentration of fermented sea kelp (which can look QUITE orange depending on the season it is harvested and extracted). They are still Shark Sauce, made in the exact same way with the exact same recipe in the exact same location. We have confirmed with our supplier multiple times (as you can imagine, it is natural for some people to be concerned when their product looks rather different), and they have assured us that this is natural, normal, and safe.
It is very understandable if you are still concerned, so if you have any questions regarding your products, please feel free to email us at firstname.lastname@example.org