Introduction¶

When we download bash scripts that have been written by others in our daily work, sometimes some key strings are marked with special colors. How can this effect be achieved by writing in a script?

Font color¶

Background color of font¶

Display mode¶

Mode of execution¶

• \033[1;31;40m "1" indicates the display mode, which is optional. "31" indicates the font color. "40m" indicates the font background color

• \033[0m Restore the terminal default color, that is, cancel the color setting

Script example¶

We can write a script to observe the color change.

#!/bin/bash
# Font color cycle
for color1 in {31..37}
    do
        echo -e "\033[0;${color1};40m---hello! world---\033[0m"
    done

echo "-------"

# Background color cycle
for color2 in {40..47}
    do
        echo -e "\033[30;${color2}m---hello! world---\033[0m"
    done

echo "-------"

# Cycle of display mode
for color3 in 0 1 4 5 7 8
    do
        echo -e "\033[${color3};37;40m---hello! world---\033[0m"
    done

Shell > chmod a+x color_set.sh
Shell > ./color_set.sh

The effect is as follows:

Author: tianci li

Contributors: Steven Spencer