All cards are displayed in their original colors.
For most maps, from the period 1500-1800, there are no separate colors for each country, but for the continents. Exception to this is Johannes de Ram's map from 1683.
Depending on function and / or taste, many people choose the Gall or Mercator projection. These projections are different ways to project the surface of a round planet on a flat plane. However, since projecting the surface of a round-body body on a flat surface can never be reproduced simultaneously and surface-wise, any type of map projection is different in nature and function.
Globular projection (see map, from 1684): Both halves of the globe are displayed on two separate circles
Winkel Projection (See Map, from 1528): Surface of the World has been projected on an oval-shaped map.
Mercator projection (see eg 1808 map): shapely map, but less surface accurate. Northern and Southern hemispheres are stretched in width and height relative to the area around the equator. But the most popular map projection, even used by Google.