A simple Bash, C, JS or Python code to display colors in the terminal. Output of each script is:
When the terminal receives the sequence of ascii characters 27, 91, 51, 49, 109 it will start to print things in red.
Ascii character 27 has octal value 33, so it is represented by \033 in octal or \x1b in hexadecimal. It corresponds to the escape key on the keyboard. Characters corresponding to ascii codes 91, 51, 49, 109 are [31m. Hence complete sequence of 5 characters is written \033[31m or \x1b[31m.
To go back to previous color the sequence \033[0m should be sent to the terminal.
To display a message in red in nodejs:
console.log("\033[31mmessage in red\033[0m")To display a blue message with green background in python:
print("\033[42m\033[34mblue message with green background\033[0m")To display a light green message in rust:
println!("\x1b[48;5;120mThis message is light green.\x1b[0m");