There is certainly something strange here. I don't think it can be carry-over, PE, as Steve is talking about freshly mixed blix, waiting in the bottle to be used for replenishment.
I know the "Quality Street" toffees of which you speak, Steve and I am sure my blix was never that kind of a brown. It always had a reddish/maroon look to it. The toffees of which you speak are very clearly an unmistakeable light brown.
Unless Quality Street toffees are available in the States the colour may mean little to him. Pity as the toffees are a "proud to be British" confection.
It is why we have terrible teeth but big smiles