Sale price Liquid for accessible Shopify themes - https://www.shopify.com/partners/blog/developing-shopify-themes-with-accessibility-in-mind

developing-accessible-shopify-themes-sale-price-liquid-sale-price.liquid

{% if product.compare_at_price > product.price %>
  <span class=”visually-hidden”>Regular Price</span>
  <span id=”ComparePrice”> $100</span>
  <span class=”visually-hidden”>Sale price</span>
{% endif %}

<span id=”ProductPrice” itemprop=”price”>$50</span>

<style>
  .visually-hidden {
    position: absolute !important;
    overflow: hidden;
    clip: rect(0 0 0 0);
    height: 1px;
    width: 1px;
    margin: -1px;
    padding: 0; 
    border: 0;
  }
</style>