The code below is a sample of echo in colour, it will run through all the sequences and ouput some nice looking tables. This can be use to test what different colours will look like as well as show the hidious combinations.

show-colors.sh

#/bin/sh
# Show all the colours of the rainbow, should be run under bash
for STYLE in 0 1 2 3 4 5 6 7; do
  for FG in 30 31 32 33 34 35 36 37; do
    for BG in 40 41 42 43 44 45 46 47; do
      CTRL="\033[${STYLE};${FG};${BG}m"
      echo -en "${CTRL}"
      echo -n "${STYLE};${FG};${BG}"
      echo -en "\033[0m"
    done
    echo
  done
  echo
done
# Reset
echo -e "\033[0m"