Contact Form Style Button

Hi

I have installed Contact 7 plugin and need to style the button
to red.

Added both of these (one at a time) in the additional settings area and it didn’t work

.wpcf7 input[type=”submit”],
{
background-color: red;
color: #000;
width: 50%;
}

.wpcf7 button
{
background-color: red;
}