Changing subscription button color

My site is here

  1. As you can see the subscription button for the Jetpack widget is gray and the font is white so you can’t see it. Is there anyway to change the button color or at least the text? I read another topic similar to my issue but it didn’t work. I tried to use this

#subscribe-email input {
color: #333;

  1. Also, would I be able to change the font or button color for a Mailchimp email plugin widget as well? I have removed it for the time being because it was difficult to read as well.