managing colors

https://codesandbox.io/s/8kkyl4mlm9

by Swedish_li

HTML

<div class="container">
  <h3>Terms and conditions</h3>
  <p>A Terms and Conditions agreement defines the rules, requirements, acceptable behavior, and other useful terms users must
    agree to before using your website or mobile app.</p>
  <p class="center">
    <button>Accept</button>
    <button>Decline</button>
  </p>
</div>

CSS

:root {
  --primary-color: #ed6564;
  --accent-color: #388287;
}

html {
  background-color: var(--primary-color);
}

h3 {
  border-bottom: 2px solid var(--primary-color);
}

button {
  color: var(--accent-color);
  border: 1px solid var(--accent-color);
}

p {
  color: var(--accent-color);
}


/* -- base -- */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  padding: 30px;
  font: normal 13px/1.5 sans-serif;
  color: #546567;
  background-color: var(--primary-color);
}

.container {
  background: #fff;
  padding: 20px;
}

h3 {
  padding-bottom: 10px;
  margin-bottom: 15px;
}

p {
  background-color: #fff;
  margin: 15px 0;
}

button {
  font-size: 13px;
  padding: 8px 12px;
  background-color: #fff;
  border-radius: 3px;
  box-shadow: none;
  text-transform: uppercase;
  font-weight: bold;
  cursor: pointer;
  opacity: 0.8;
  outline: 0;
}

button:hover {
  opacity: 1;
}

.center {
  text-align: center;
}