.components-checkbox-control__input[type="checkbox"] {
    &.components-checkbox-control__input--indeterminate {
        background: var(--wp-admin-theme-color);
        border-color: var(--wp-admin-theme-color);

        // Hide default checkbox styles in IE.
        &::-ms-check {
            opacity: 0;
        }
    }

    &.components-checkbox-control__input--indeterminate::before {
        content: none;
    }
}