The flag of the Republic of the Rio Grande is a blue hoist with three white stars running evenly along the hoist. with the fly split into three bands of white, red, and black.
Other designs[]
There are other suggested designs for the flag as noted by historians, including tricolors of red, white, and black; red, white, and blue; and red, white, and green. Historians have noted that, whatever the flag looked like, it bore similarities to the 1839 flag of the Republic of Texas and the 1841 flag of the later Republic of Yucatán.
Black bottom stripe variant (now used by the city of Laredo, Texas)
.svg "Republic of the Rio Grande (green variant).svg (3 KB)")
Green bottom stripe variant
.svg "Republic of the Rio Grande (blue variant).svg (3 KB)")
Blue bottom stripe variant
Symbolism[]
The three stars represent the three states that seceded: Coahuila, Nuevo León, and Tamaulipas.