termcolors.sh

#!/bin/bash

cat > /tmp/termcolors.java <<EOF
public class termcolors {
    public static void main(String[] args) {
        for (int i = 0; i < 256; i++) {
            System.out.printf("\033[38;5;%sm#@%03d", i, i);
            System.out.print("  ");

            if (i % 12 == 0) System.out.println();
        }
        System.out.println();
    }
}
EOF
javac /tmp/termcolors.java &&
java -cp /tmp termcolors

cat <<EOF

#!/bin/bash
N=202
echo -e "\033[38;5;\${N}mTry Me\033[0m"
EOF