ANSI escape sequences to print colored text(linux terminal)

ANSI escape sequences are a standardized way to add color and formatting to text in the terminal. Here are some common ANSI escape sequences for printing colored text:

Color Codes(Foreground)

Color	Code
Reset	\033[0m
Black	\033[30m
Red	\033[31m
Green	\033[32m
Yellow	\033[33m
Blue	\033[34m
Magenta	\033[35m
Cyan	\033[36m
White	\033[37m

Background Color Codes

Color	Code
Black Background	\033[40m
Red Background	\033[41m
Green Background	\033[42m
Yellow Background	\033[43m
Blue Background	\033[44m
Magenta Background	\033[45m
Cyan Background	\033[46m
White Background	\033[47m

Example Usage in Python

print("\033[31m" + "This text is red" + "\033[0m")

print("\033[32m" + "This text is green" + "\033[0m")

print("\033[34m" + "This text is blue" + "\033[0m")

print("\033[41m" + "This text has a red background" + "\033[0m")

print("\033[42m" + "This text has a green background" + "\033[0m")

Note

• ANSI escape sequences may not work on all systems or terminals.
• The \033[ code is the ESCAPE sequence that starts the ANSI command.
• The m at the end of each code is what actually applies the change.

Other useful escape sequences:

To clear the whole line in a bash script when using \r to print on the same line, you can use the following methods:

Method 1: Using ANSI Escape Sequences

Bash

echo -ne "\r\033[K"

• \r moves the cursor to the beginning of the line.
• \033[K clears the line from the cursor position to the end.

Using printf command:

printf "\r%s \x1b[32m%s\x1b[0m\033[K\n" "$test_name" "Passed."

Method 2: Using tput

Bash

echo -ne "\r$(tput el)"

• \r moves the cursor to the beginning of the line.
• tput el clears the line from the cursor position to the end.

Example Usage

Bash

for i in {1..10}; do
    echo -ne "\rProgress: $i%"
    sleep 0.5
done
echo -ne "\r\033[K"
echo "Done!"

In this example, the progress is printed on the same line, and after the loop finishes, the line is cleared, and "Done!" is printed.