/etc/console-setup/vtrgb.vga is in console-setup-linux 1.178ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | 0,170,0,170,0,170,0,170,85,255,85,255,85,255,85,255
0,0,170,85,0,0,170,170,85,85,255,255,85,85,255,255
0,0,0,0,170,170,170,170,85,85,85,85,255,255,255,255
|