parent `backgroundColor` and `backgroundImage` children Container border

[vmaark]

Love the lib, but ran into a problem fast, setting a background messes up children's Container borders. how to reproduce:

 <div
  style={{
    backgroundColor: "#59AAAA",
  }}
>
   <Container>
      <p>Containers</p>
      <Row>
        <Col>
          <Container>Regular</Container>
        </Col>
        <Col>
          <Container rounded>Rounded</Container>
        </Col>
        <Col>
          <Container title="With Title">Title for this one</Container>
        </Col>
      </Row>
      <Row>
        <Col>
          <Container dark>Dark</Container>
        </Col>
        <Col>
          <Container centered>Centered text for this one!</Container>
        </Col>
      </Row>
    </Container>
  </div>