All terminal colours

gistfile1.txt

echo -e '\033[00;30m 00;30m \033[00m \033[02;30m 02;30m \033[00m \033[01;30m 01;30m \033[00m \033[01;40m 01;40m \033[00m
\033[00;31m 00;31m \033[00m \033[02;31m 02;31m \033[00m \033[01;31m 01;31m \033[00m \033[01;41m 01;41m \033[00m
\033[00;32m 00;32m \033[00m \033[02;32m 02;32m \033[00m \033[01;32m 01;32m \033[00m \033[01;42m 01;42m \033[00m
\033[00;33m 00;33m \033[00m \033[02;33m 02;33m \033[00m \033[01;33m 01;33m \033[00m \033[01;43m 01;43m \033[00m
\033[00;34m 00;34m \033[00m \033[02;34m 02;34m \033[00m \033[01;34m 01;34m \033[00m \033[01;44m 01;44m \033[00m
\033[00;35m 00;35m \033[00m \033[02;35m 02;35m \033[00m \033[01;35m 01;35m \033[00m \033[01;45m 01;45m \033[00m
\033[00;36m 00;36m \033[00m \033[02;36m 02;36m \033[00m \033[01;36m 01;36m \033[00m \033[01;46m 01;46m \033[00m
\033[00;37m 00;37m \033[00m \033[02;37m 02;37m \033[00m \033[01;37m 01;37m \033[00m \033[01;47m 01;47m \033[00m'

Try this one (colors from 31 to 240:
for ((i=31; i<=240; i++)); do printf "\e[1m\e[38;5;${i}m $i \e[0m"; sleep 0.1; done;
or this one (the number 7 gives backround color)
for ((i=31; i<=240; i++)); do printf "\e[1m\e[38;7;${i}m $i \e[0m"; sleep 0.1; done;

"\033" is equal with "\e" but "\033" is more widely used as i know