The Vermont state flag—as adopted on 20 October 1837—was the current U.S. flag with the multiple stars replaced by a single large star with the Vermont coat of arms (from the seal) within the star.  The details of the star were unspecified, and both 5-point and 8-point stars were used with 8-points slightly more common.The red and blue colours are from the U.S. flag; Old Glory Blue (Pantone 281, #002664), and Old Glory Red (Pantone 193, #BB133E).
Own work
Michael J. Burrage