function wpdc_add_custom_gutenberg_color_palette() {
add_theme_support(
'editor-color-palette',
[
[
'name'  => esc_html__( 'Brown', 'wpdc' ),
'slug'  => 'brown',
'color' => '#3a3335',
],
[
'name'  => esc_html__( 'Orange', 'wpdc' ),
'slug'  => 'orange',
'color' => '#f0544f',
],
[
'name'  => esc_html__( 'Light Green', 'wpdc' ),
'slug'  => 'light-green',
'color' => '#c6d8d3',
],

]
);
}
add_action( 'after_setup_theme', 'wpdc_add_custom_gutenberg_color_palette' );