Please can someone help with custom CSS code?

Hi all,

I wonder if anyone could be so good to tell me what I need to type in the custom CSS section to change the colour of the text in the ‘subscribe to our blog’ text field on page: https://www.fahrenheitstoves.com/more/mr-fahrenheit-wood-burning-stove-installation-blog-how-to-guide-secrets-tricks-of-the-trade/

I’d like it to display red, white, cream…..anything other than black really.

Thanks in advance,
Chris