html {
  background: linear-gradient(#5BAC39, #7EC749);
}

nav, .hex-back {
  background-color: #448a26;
}

nav a#activeTab:link, .hex-front {
  background-color: #5BAC39;
}

nav a:hover {
  color: #448a26;
}

.content-box img {
  height: 240px;
  border-radius: 10px;
  outline: solid #448a26 5px;
  margin: 10px;
}