not easy to make a comparison right now, as I'm sitting in a non-daylight type of electric light, but......I'd say the colour of my hat is identical to your pix of the 6th October showing the pane of crown window glass, the strap handled jug and the piece of cullet. As for the colour, I'd agree with Keith Vincent's description of "a pale green metal, the characteristic Nailsea colour" (for articles other than the bottles) - although as with all glass 'colours' this is open to some degree of personal interpretation, and can be variable depending on the thickness of the glass, but I think the match with my hat is o.k. as a pale watery green.
As we've said before, the sand used at Nailsea appears to have been sourced locally (to Bristol), certainly in this factory's earlier period, to minimize transport costs - obviously when you're making utility articles economy is important, and maybe different 'sands' produce slightly differing colours, and this one is PERHAPS characteristic of the particular Nailsea source of sand. But on the other hand maybe most sands give something close to this when you aren't using the cleanest and most pure product with iron impurities.
Vincent's book categorizes the various types of glass from Nailsea, and in his category No. 1 he refers to articles of a 'pale green tinge' as soda-lime glasses, for which, obviously, one constituent was manganese. You'd assume the factory had made various trials and found this was the nearest they could get to a clear glass, and had they introduced a greater quantity of manganese this would have created its own problem by making the glass darker rather than simply de-colourizing the stuff.
As you'd imagine, the recipe for this 'pale green tinge' doesn't include iron oxide - which was however added to the batch when manufacturing bottles (and the manganese was probably omitted) - presumably it was traditional to have dark green or brown for bottles - and probably cheaper to produce. Perhaps no factory had made clear bottles prior to this date??? Why were bottles always dark green or brown??
Vincent suggests that it seems unlikely that flint glass (i.e. clear) was produced at Nailsea - all items examined appear to have the pale green tinge present to some degree - even thinly blown pieces.
So........my hat might have been made at Nailsea, possibly