session-desktop/stylesheets/_session_theme_dark.scss

// Messages 
.dark-theme {
    .module-conversation-header {
        background-color: $session-color-dark-1;
    }
    .discussion-container {
        background-color: $session-color-dark-2;
    }

    .module-message__author {
        color: $session-color-dark-5;       
    }

    .module-message__metadata__badge {
        color: $session-color-dark-4;
    }
    .module-message__metadata__date--incoming {
        color: $session-color-dark-4;
    }
    .module-message__metadata__date--outgoing {
        color: $session-color-dark-5;
    }

    .module-message__container--incoming {
        background-color: $session-color-dark-1;
    }

    .module-message__container--outgoing {
        background-color: $session-color-dark-3;
    }

}


.message-read-receipt-container {
    margin-left: 5px;
  }