Linux FAQ : 給予顯示文字色彩

https://stackoverflow.com/questions/5947742/how-to-change-the-output-color-of-echo-in-linux

https://www.codegrepper.com/code-examples/shell/bash+echo+color

Black        0;30     

Dark Gray     1;30 

Red          0;31     

Light Red     1;31 

Green        0;32     

Light Green   1;32 

Brown/Orange 0;33     

Yellow        1;33 

Blue         0;34     

Light Blue    1;34 

Purple       0;35     

Light Purple  1;35 

Cyan         0;36     

Light Cyan    1;36 

Light Gray   0;37     

White         1;37

方案 1 : shell script

RED='\\033[0;31m' #設定改變色彩 

NC='\\033[0m' # 還原用讓後面字詞不改變 

echo -e "I ${RED}love${NC} Stack Overflow\\n"

方案 2 : 

echo -e "I \033[0;31mlove\033[0m Stack Overflow\n"