Testing color scripts

color.sh

#!/usr/bin/env bash
# Source: https://misc.flogisoft.com/bash/tip_colors_and_formatting

set -e

echo "=== 16 colors ==="

# Background
for clbg in {40..47} 49 {100..107}; do
  # Foreground
  for clfg in {30..38} 39 {90..97}; do
    # Formatting
    for attr in {0..8}; do
      # Print the result
      echo -en "\e[${attr};${clbg};${clfg}m \\\e[${attr};${clbg};${clfg}m \e[0m"
    done
    echo #Newline
  done
done

echo "=== 256 colors ==="

for fgbg in 38 48; do       # Foreground / Background
  for color in {0..255}; do # Colors
    # Display the color
    printf "\e[${fgbg};5;${color}m  \\\e[${fgbg};5;%3sm  \e[0m" "$color"
    # Display 6 colors per lines
    if [ $(((color + 1) % 6)) == 4 ]; then
      echo # New line
    fi
  done
  echo # New line
done

exit 0