There is some debate about the distribution of colours on this flag; I have shown what I think is the most likely and pleasing of the possibilities. The 1753 "État général" volume simply says "2 Drapeaux, dont un colonel blanc & un d'ordonnance bleu, feuille-morte [dead leaf colour] and isabelle [coffee brown] par bandes dans les quarrés, & croix blanche", which does not help greatly, although taking it literally one might assume the quarters were coloured, from the top, blue, then dead leaf, then Isabelle!
UPDATE Th07.04.2022: The French 1721 Manuscript confirms this design for the flags; the regiment was then called Nivernois.
Unfortunately I have no 1757 illustration of these flags and the uniform. Basically the regiment probably had blue cuffs, all else being French off-white until 1761 when it acquired a blue waistcoat and collar; the pockets were horizontal with 4 copper buttons.
These flags complete the flags of the first line of the right wing infantry of the French army at Minden. Next will be Auvergne which formed a 4 battalion brigade in the second line of right wing infantry. The rest of the second line consisted of 3 French German regiments totalling 4 battalions. I haven't yet decided if I'll do the flags of French foreign infantry units at Minden as they're vastly more work; for now, I'll be doing just the French regiments so after Auvergne I'll be heading to the French left wing.