Dark blue box with thick light blue border

<div style="background: #123456; color: blue; border-radius: 25px; padding: 20px; border: 15px solid #abced8;">
    <h2><span style="color: #ffffff;">Heading2 Here</span></h2>
    <p><span style="color: #ffffff;">Text here</span></p>
    <h3><span style="color: #ffffff;">Heading3 Here</span></h3>
    <p><span style="color: #ffffff;">More text here.</span></p>
</div>