{% capture theme %}{% if page.theme %}{{ page.theme }}{% else %}{{ site.primer.theme }}{% endif %}{% endcapture -%}
{%- if theme contains "light" -%}
  data-color-mode="light" data-light-theme="{{ theme }}"
{%- elsif theme contains "dark" -%}
  data-color-mode="dark" data-dark-theme="{{ theme }}"
{%- elsif theme contains "auto" -%}
  {%- assign partial_theme = theme | remove_first: "auto" -%}
  data-color-mode="auto" data-light-theme="light{{ partial_theme }}" data-dark-theme="dark{{ partial_theme }}"
{%- else -%}
  data-color-mode="auto" data-light-theme="light" data-dark-theme="dark"
{%- endif -%}