<?php
add_action( 'wp_enqueue_scripts', 'hashone_enqueue_styles' );
function hashone_enqueue_styles() {
wp_enqueue_style( 'hashone-parent-style', get_template_directory_uri() .
'/style.css' );
}

/*
 * Theme Name: HashOne Child
 * Template: hashone
 * Text Domain: hashone-chile
 */

<?php
add_action( 'wp_enqueue_scripts', function() {
  wp_enqueue_style( 'hashone-parent-style', get_template_directory_uri() . '/style.css' );
});

#site-title {
    color: #000000;
    background: #ffffff;
}

#site-title {
    color: #ffffff !important;
    background: #000000 !important;
}

get_theme_file_uri()
get_parent_theme_file_uri()
get_theme_file_path()
get_parent_theme_file_path()

get_stylesheet_directory_uri()
get_template_directory_uri()
get_stylesheet_directory()
get_template_directory()