How to get specific setting by settings_fields()?

Question

I am working on a plugin and on the settings page I have 2 settings and I want to show Only one setting "backgroundColor" so how should i do that?

This is the code:

<form action="options.php" method="post">
<?php
    settings_errors();

    settings_fields( 'bg_color' );  **<<< I want only background settings to show how i can do it correclty?**

    do_settings_sections( 'plugin-style' );

    submit_button( __('Save settings', 'trans') );
                                        ?>
</form>


        /* Add Settings Field for Background Color */
    add_settings_field(
        'background-color',
        __('Background Color', 'trans'),
        'plugin_background_color_ca',
        'plugin-style',
        'style-settings-section-2',
        array(
            'name'      => 'bg_color',
            'id'        => 'style-settings-background-color',
            'class'     => 'style-settings-background-color',
            'options'   => $style_opts,
        )
    );

    /* Add Settings Field for Font Size */
    add_settings_field(
        'st-search-font-size',
        __('Font Size', 'trans'),
        'plugin_font_size_ca',
        'plugin-style',
        'style-settings-section-2',
        array(
            'name'      => 'font_size',
            'id'        => 'style-settings-font-size',
            'class'     => 'style-settings-font-size',
            'options'   => $style_opts,
        )
    );

N