Vmeda.Online/src/addons/mod/assign/pages/edit/edit.scss

:host {
    core-timer {
        &.core-timer-under-300 {
            --timer-background: var(--danger-tint);
            --timer-text-color: var(--danger-shade);
        }

        &.core-timer-under-900 {
            --timer-background: var(--warning-tint);
            --timer-text-color: var(--warning-shade);
        }
    }
}