Can't display variant.featured_media in a label html tag

[diego10_01]

I'm trying to display the image of a variant in a label tag, but it isn't showing. The bold text is the code that I'm trying to use:

<label for="option-{{ section.id }}-{{ forloop.parentloop.index0 }}-{{ forloop.index0 }}" class="ColorSwatch ColorSwatch--large {% if downcase_value == 'white' %}ColorSwatch--white{% endif %}" data-tooltip="{{ value | escape }}" style= "background-image: url('{{variant.featured_image}}')"></label>

Am I mixing css and liquid incorrectly?