Shopify: Show number of colors available

gistfile1.txt

{% for option in product.options %}
	{% if option contains "Color" %}
        {% assign optionName = "option" | append: forloop.index %}
        {% assign colors = product.variants | map: optionName %}
        {% assign colorsFiltered = '' %}
        {% for colorOption in colors %}
          {% unless colorsFiltered contains colorOption %}     
          {% assign colorsFiltered = colorsFiltered | append: ', ' | append: colorOption %}     
        {% endunless %}             
        {% endfor %}     

	{% endif %}
{% endfor %}
{% assign uniqueColors = colorsFiltered | remove_first: ', ' | split: ', ' %}
{% if product.options contains "Color" %}{{ uniqueColors.size }} colors available{% endif %}