They are hexadecimal RGB colour codes converted to decimal numbers. For example, a light yellow colour has these RGB values:
Red: 255
Green: 236
Blue: 139
The hexadecimal code for this colour is: FFEC8B
Convert that to decimal: 16772235
The number 16772235 is what has to be put into the txt files in this example.
Red: 255
Green: 236
Blue: 139
The hexadecimal code for this colour is: FFEC8B
Convert that to decimal: 16772235
The number 16772235 is what has to be put into the txt files in this example.