html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
}

.m-panel > button {
    background-color: orangered !important;
}

.m-areas > div.m-area > div.m-panel.collapsed > button.m-panel-btn {
    background-color: orangered !important;
}

.m-areas > div.m-area > div.m-panel.m-panel-modal.collapsed > button.m-panel-btn {
    background-color: orangered !important;
}