Listando cores da casca

Os seguintes comandos exibirão as 16 cores no terminal:

echo -e "33[1;37mCOLOR_WHITEt33[0;30mCOLOR_BLACK"
echo -e "33[0;34mCOLOR_BLUEt33[1;34mCOLOR_LIGHT_BLUE"
echo -e "33[0;32mCOLOR_GREENt33[1;32mCOLOR_LIGHT_GREEN"
echo -e "33[0;36mCOLOR_CYANt33[1;36mCOLOR_LIGHT_CYAN"
echo -e "33[0;31mCOLOR_REDt33[1;31mCOLOR_LIGHT_RED"
echo -e "33[0;35mCOLOR_PURPLEt33[1;35mCOLOR_LIGHT_PURPLE"
echo -e "33[0;33mCOLOR_YELLOWt33[1;33mCOLOR_LIGHT_YELLOW"
echo -e "33[1;30mCOLOR_GRAYt33[0;37mCOLOR_LIGHT_GRAY"