Subscribe Form confirmation text color

Dear Support,
I want to set the text color for the confirmation text after sending out the subscribe form. I can set the button text color but not the confirmation text color which makes it look not nice. Here is the website, you can subscribe and see the result:
Please advise on the best practice to do this.
Thank you in advance.

Hi Stayko,

You should be able to change the confirmation text color using the WYSIWYG. See my animated gif below.