Babylon.js/nodeEditor/src/components/log/log.scss

#log-console {
    background: #333333;
    height: 120px;
    box-sizing: border-box;
    margin: 0;
    padding: 10px;
    width: 100%; 
    overflow: hidden;
    overflow-y: auto;

    .log {
        color: white;
        font-size: 14px;
        font-family: 'Courier New', Courier, monospace;

        &.error {
            color:red;
        }
    }
}