acf_gutenberg_3.twig

{#
/**
 * Block Name: Testimonial
 *
 * This is the template that displays the testimonial block.
 */
#}
<blockquote id="testimonial-{{ block.id }}" class="testimonial">
    {{ fields.testimonial }}
    <cite>
        <span>{{ fields.author }}</span>
        <img src="{{ Image( fields.avatar ) | resize( 150, 150 ) }}" alt="{{ Image( fields.avatar ).alt }}" /> 
    </cite>
</blockquote>
<style type="text/css">
        #testimonial-{{ block.id }} {
                background: {{ fields.background_color }};
                color: {{ fields.text_color }};
        }
</style>