Is it possible to include the underscore in the color scheme

On this site downloaded color scheme for Sublime Text, in which, for example, a class name must be underlined. But when choosing this theme in Sublime Text underlining, no. Tried to do it with multiple themes is not working. A Google search gave no results. Question: maybe someone knows how to include the underscore?

Underscore Low Profile Raised Floor System

Underscore

Windows Terminal Config - Make it Your Own - Scott Spence

What is an Underscore?

7 Ways to Create a Fillable Field with Underline in Your Word Document

Custom Excel number format

How to Choose a Color Scheme for Your Website - DreamHost

Color – Theme Handbook

formatting - How to change the default style of text links in

Underline text or spaces - Microsoft Support

Applying Fill, Line and Font Styles

Customize the Color of VSCode's Error Underline Squiggles

MBS Claris FileMaker Blog - Different colors for variables in