How to design custom product labels and badges | Shopify

{%- assign labels = product.metafields.custom.labels.value -%}

<div class="product-labels">
  {%- for label in labels -%}

    {%- assign background_color = label.color -%}
    {%- assign color_string = "" | append: background_color -%}
    {%- assign text_color = color_string | color_lighten: 100 -%}  

    <small class="product-label" style="background-color: {{ background_color }}; color: {{ text_color }};">
      {{ label.title }}
    </small>

  {%- endfor -%}
</div>