Шаблон:Сoloredbox/styles.css

.coloredbox {
    background-color: #ADD8E6; 
    color: #000000; 
    padding: 20px; 
    border-radius: 15px; 
    margin: 5px 0; 
    box-sizing: border-box; 
}

.coloredbox:not([data-color]) {
    background-color: #ADD8E6;
}

[data-color] {
    background-color: var(--dynamic-color);
}