to do this simply open CMD, this can be done by simply pressing ⊞+ r to open the run menu, type in CMD and press enter, then tyoe color and type the sign of the color, we have a list of all color signs.after that double it up to add a background color!
Value Color
0 Black
1 Blue
2 Green
3 Aqua
4 Red
5 Purple
6 Yellow
7 White
8 Gray
9 Light blue
a Light green
b Light aqua
c Light red
d Light purple
e Light yellow
f Bright white