Expected Result:

I was trying to get folder and file icons similar to the ones used in ITS Theme.
What I’ve tried
After checking the source code of the theme i tried the following code
.nav-folder-children .nav-folder-title-content::before {
content: '\E801';
color: var(--folder);
}
.nav-file-title .nav-file-title-content::before {
content: '\e800';
text-align: center;
color: var(--file);
}
According to what i know \e801 is a unicode character. I’ve tried other HTML symbols like : I used ★ for star but instead of showing star as the folder icon it’s showing the no ★
The code that is working:
/* Folder and file icons */
.nav-folder-children .nav-file-title-content:first-child::before { content: '🗒 '; }
.nav-folder-children .nav-folder-title-content::before { content: '📂 '; }
But I don’ like this look of folder icons
How can i get the expected result ?