Hello. I am trying to build a map of Colombia, in which I attach a specific color. each of its departments (the main administrative division of the country) .

The following code seems to be working quite well:

colores = {Blue, Yellow, RGBColor[1, 0, 0], Yellow, Darker[Orange], 
   Yellow, White, Darker[Orange], Yellow, Darker[Orange], 
   Darker[Red], RGBColor[0.35, 0, 0.35], Darker[Red], Cyan, Blue, 
   Blue, Blue, RGBColor[0.35, 0, 0.35], RGBColor[0.35, 0, 0.35], 
   Darker[Red], Darker[Orange], White, White, Cyan, White, White, 
   White, Darker[Orange], Darker[Red], White, White, Blue, Blue} ;

departamentos = 
  Entity["Country", "Colombia"][
   EntityProperty["Country", "AdministrativeDivisions"]];
mapita=GeoGraphics[{EdgeForm[Black], FaceForm[colores[[1]]], 
  Polygon[departamentos[[1]]], FaceForm[colores[[2]]], 
  Polygon[departamentos[[2]]], FaceForm[colores[[3]]], 
  Polygon[departamentos[[3]]], FaceForm[colores[[4]]], 
  Polygon[departamentos[[4]]], FaceForm[colores[[5]]], 
  Polygon[departamentos[[5]]], FaceForm[colores[[6]]], 
  Polygon[departamentos[[6]]], FaceForm[colores[[7]]], 
  Polygon[departamentos[[7]]], FaceForm[colores[[8]]], 
  Polygon[departamentos[[8]]], FaceForm[colores[[9]]], 
  Polygon[departamentos[[9]]], FaceForm[colores[[10]]], 
  Polygon[departamentos[[10]]], FaceForm[colores[[11]]], 
  Polygon[departamentos[[11]]], FaceForm[colores[[12]]], 
  Polygon[departamentos[[12]]], FaceForm[colores[[13]]], 
  Polygon[departamentos[[13]]], FaceForm[colores[[14]]], 
  Polygon[departamentos[[14]]], FaceForm[colores[[15]]], 
  Polygon[departamentos[[15]]], FaceForm[colores[[16]]], 
  Polygon[departamentos[[16]]], FaceForm[colores[[17]]], 
  Polygon[departamentos[[17]]], FaceForm[colores[[18]]], 
  Polygon[departamentos[[18]]], FaceForm[colores[[19]]], 
  Polygon[departamentos[[19]]], FaceForm[colores[[20]]], 
  Polygon[departamentos[[20]]], FaceForm[colores[[21]]], 
  Polygon[departamentos[[21]]], FaceForm[colores[[22]]], 
  Polygon[departamentos[[22]]], FaceForm[colores[[23]]], 
  Polygon[departamentos[[23]]], FaceForm[colores[[24]]], 
  Polygon[departamentos[[24]]], FaceForm[colores[[25]]], 
  Polygon[departamentos[[25]]], FaceForm[colores[[26]]], 
  Polygon[departamentos[[26]]], FaceForm[colores[[27]]], 
  Polygon[departamentos[[27]]], FaceForm[colores[[28]]], 
  Polygon[departamentos[[28]]], FaceForm[colores [[29]]], 
  Polygon[departamentos[[29]]], FaceForm[colores[[30]]], 
  Polygon[departamentos[[30]]], FaceForm[colores[[31]]], 
  Polygon[departamentos[[31]]], FaceForm[colores[[32]]], 
  Polygon[departamentos[[32]]], FaceForm[colores[[33]]], 
  Polygon[departamentos[[33]]]}]

However, I have not managed to build a map without the background (which in this case is a nuisance). I have tried to plug in GeoBackground->None at different parts of the code, but without success. How can I dispose of the pesky background?

Any help appreciated.

Francisco