In the header Mailchimp sign up section- I want to adjust the color of the text of the message that is displayed after the person fills in the info and hits subscribe. 

Currently this text shows in a gray that doesn't show up with our brand colors and I would like it white. 

I've looked in the customize>Colors for header sign-up form and there is no option to pick to customize the message text. 

I'm using the Mailchimp for Wp plugin and there is not where in the plug in for me to change the message text color there.

Can you direct me to where this can be changed?