How to Use Colors in Bash Output for Clear Terminal Messages

To use colors in bash output, include ANSI escape codes inside echo or printf commands. Wrap your text with \e[COLOR_CODEm to start the color and \e[0m to reset it, for example, \e[31mRed Text\e[0m prints red text.

Syntax

Colors in bash are created using ANSI escape codes. The general pattern is:

• \e[ or \033[: starts the escape sequence.
• COLOR_CODEm: sets the text color or style.
• Text to color: the actual output text.
• \e[0m: resets the color back to default.

Example: \e[31mRed Text\e[0m prints "Red Text" in red.

bash

echo -e "\e[31mThis is red text\e[0m"

Output

This is red text

Example

This example shows how to print text in different colors using bash. It uses echo -e to enable interpretation of escape sequences.

bash

#!/bin/bash

echo -e "\e[31mRed\e[0m"
echo -e "\e[32mGreen\e[0m"
echo -e "\e[33mYellow\e[0m"
echo -e "\e[34mBlue\e[0m"
echo -e "\e[35mMagenta\e[0m"
echo -e "\e[36mCyan\e[0m"
echo -e "\e[1;37mBold White\e[0m"

Output

Red
Green
Yellow
Blue
Magenta
Cyan
Bold White

Common Pitfalls

Common mistakes when using colors in bash include:

• Forgetting to use -e with echo, so escape codes are not interpreted.
• Not resetting color with \e[0m, causing all following text to stay colored.
• Using incorrect or unsupported color codes.
• Using \033 vs \e inconsistently (both work but be consistent).

Always test your scripts in the terminal to verify colors show correctly.

bash

echo "\e[31mThis will not be red"
echo -e "\e[31mThis will be red\e[0m"

Output

This will not be red
This will be red

Quick Reference

Color	Code	Description
Black	30	Black text
Red	31	Red text
Green	32	Green text
Yellow	33	Yellow text
Blue	34	Blue text
Magenta	35	Magenta text
Cyan	36	Cyan text
White	37	White text
Bold	1	Bold style
Reset	0	Reset all styles

Key Takeaways

Use ANSI escape codes with \e[COLOR_CODEm and \e[0m to add colors in bash output.

Always include -e with echo to enable escape sequence interpretation.

Reset colors after colored text to avoid affecting later output.

Test your color codes in the terminal to ensure compatibility.

Use the quick reference table to pick correct color codes easily.