change header in e-mail of a new order

How can I Change the design (text and Background Color) when I will get a new order.
Enclosed you can find an example-
kindly regards

Hello there,

I hope you are doing well today.

Could you please provide a link to your website so that I can inspect it?

Best Regards,

Thanks for your answer.
The link of my shop is:

Hi three

You cant do this from the theme, you need to deal with this question from the commerce because this is handled by Woocommerce, you either need to change styles manually by coding or you need to implement third-party plugins for this,