Change color of thank-you pages

Use the CSS code below to change the colors of the thank you pages. There are two kinds of thank-you pages: The normal one and the alternate thank-you page. In this example, we set the normal thank-you page to green with white text and the alternate thank-you page to red with white text.

body.thank-you-page,
body.thank-you-page h1,
body.thank-you-page h2,
body.thank-you-page h3,
body.thank-you-page h4,
body.thank-you-page a,
body.thank-you-page .pageWrapper,
body.thank-you-page div.greeting {
    background: #66C96A;
    color: #fff
}

body.thank-you-page.alternate,
body.thank-you-page.alternate h1,
body.thank-you-page.alternate h2,
body.thank-you-page.alternate h3,
body.thank-you-page.alternate h4,
body.thank-you-page.alternate a,
body.thank-you-page.alternate .pageWrapper,
body.thank-you-page.alternate div.greeting {
    background: #FF5D50;
    color: #fff
}