As my friend Nhbenz mentioned, the word "color" in your button's backmark is spelled the British way (colour), which strongly indicates it was manufactured in Britain. One-piece brass buttons with a raised-lettering backmark (like yours) date from approximately 1790 on into the 1830s, when 1-piece buttons fell out of public favor due to the advent of machine-made INEXPENSIVE ornate/fancy 2-piece buttons. The War Of 1812 cut off importation of British buttons into the US, of course... and after the war ended (1815) British-made products were unpopular with the American public for at least ten years after the war's end. So, I think the odds favor your button having been made and imported into the US prior to the War Of 1812. But there's still a chance it is from the late-1820s/early-1830s.