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London is the most populous city in the United Kingdom,with a metropolitan area of over 9 million inhabitants
The w3-panel class is the perfect class to display notes and information.
Notes are often displayed with a color:
London is the most populous city in the United Kingdom, with a metropolitan area of over 9 million inhabitants.
<div class="w3-panel w3-yellow">
<p>London is the most populous city in the United Kingdom,
with a metropolitan area of over 9 million inhabitants.</p>
</div>
London is the most populous city in the United Kingdom, with a metropolitan area of over 9 million inhabitants.
<div class="w3-panel w3-border w3-light-grey w3-round-large">
<p>London is the most populous city in the United Kingdom,
with a metropolitan area of over 9 million inhabitants.</p>
</div>
London is the most populous city in the United Kingdom, with a metropolitan area of over 9 million inhabitants.
<div class="w3-panel w3-pale-blue w3-leftbar w3-rightbar w3-border-blue">
<p>London is the most populous city in the United Kingdom,
with a metropolitan area of over 9 million inhabitants.</p>
</div>
London is the most populous city in the United Kingdom, with a metropolitan area of over 9 million inhabitants.
<div class="w3-panel w3-pale-red w3-leftbar w3-border-red">
<p>London is the most populous city in the United Kingdom,
with a metropolitan area of over 9 million inhabitants.</p>
</div>
London is the most populous city in the United Kingdom, with a metropolitan area of over 9 million inhabitants.
<div class="w3-panel w3-pale-yellow w3-border w3-border-yellow">
<p>London is the most populous city in the United Kingdom,
with a metropolitan area of over 9 million inhabitants.</p>
</div>
London is the most populous city in the United Kingdom, with a metropolitan area of over 9 million inhabitants.
<div class="w3-panel w3-pale-green w3-bottombar w3-border-green w3-border">
<p>London is the most populous city in the United Kingdom,
with a metropolitan area of over 9 million inhabitants.</p>
</div>
London is the most populous city in the United Kingdom, with a metropolitan area of over 9 million inhabitants.
<div class="w3-panel w3-yellow w3-topbar w3-bottombar w3-border-amber">
<p>London is the most populous city in the United Kingdom,
with a metropolitan area of over 9 million inhabitants.</p>
</div>