:root {
    --main-color: #0077b6; /*blue*/
    --main-dark-color: #005683;
    --main-double-dark-color: #00456a;
    --second-color: #00a896; /*green*/
    --highlight-color: #caf0f8; /*sky blue*/
    --second-highlight-color: #cae3f8;
    --gray-color: gray;
    --light-gray-color: #F0F0F0;
}