How to change color of select field?

I have various options on a select field, and show that on List… how can I change the color

Screenshot from 2018-04-26 09-48-10

For example:

Option1 = Gray
option2 = Green
Option3 = Red

Can I define colors (indicator) DOT for Select Field front end without changing core files from backend?

A client side custom script may be what you want Error in colouring Script reports