Why aren't color and strikethrough functions working in Order Printer template?

I am editing the shopify order printer template. In there I saw two error don’t know how to fist it. The first one is that I put the color to the table heading but the color didn’t come along when printing and the other one is the strikethrough function is not working on the discount item.

This is what come out on print preview.

This is the print template that I want.

In this photo the first item has the promotion but the strikethrough function is not working

Here is the code.

{% for line_item in line_items %} {% endfor %}
ITEM QUANTITY PRICE TOTAL
{{ line_item.title }} {{ line_item.quantity }} {% if line_item.original_price != line_item.price %} {{ line_item.original_price | money }} {% endif %} {{ line_item.price | money }} {{ line_item.line_price | money }}