Ah, here is a trivial program to demo the new 256 color palette on the console:

#include <stdio.h>

int main()
{
int i;
printf ("\x1b[m\n");
for (i=0;i<256;i++) {
        printf ("\x1b[38;5;%dm#%03d  %s",i,i, ((i+1) % 16 ? "" : "\n"));
        }
printf ("\x1b[m\n");
for (i=0;i<256;i++) {
        printf ("\x1b[48;5;%dm#%03d  %s",i,i, ((i+1) % 16 ? "" : "\n"));
        }
printf ("\x1b[m\n");
}

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