First of all have in mind that your HTML is not valid! (like h3 can't be in h6, li must be inside ul, if using external css, don't use inline too...)
If your text is only single line ever, apply line-height same as container:
li {
list-style: none;
}
p {
margin: 0px
}
ul {
margin: 0px;
padding: 0px
}
.centerText {
line-height: 50px;
}
.text1 {
line-height: 100px;
font-size: 18px;
}
<li style="background:#263F73; border-style: dotted; border-width: 1px; height:100px;">
<div style="width:70%; float: left; ">
<h6 style="margin:0px;" class="text1">Text1</h6>
</div>
<ul style="float: right; height:100%; width: 30%;">
<li style=" height:50%; background:#ffffff;">
<p style=" margin: 0px;">
<p class="centerText">Text2</p>
</li>
<li style=" height:50%; background:#fff465;">
<p style=" margin: 0px;">
<p class="centerText">Text3</p>
</li>
</ul>
</li>
If you have multiline text, than use display: table and display: table-cell
li {
list-style: none;
}
p {
margin: 0px
}
ul {
margin: 0px;
padding: 0px
}
.table {
display: table;
}
.tcell {
display: table-cell;
vertical-align: middle;
}
<li style="background:#263F73; border-style: dotted; border-width: 1px; height:100px;">
<div style="width:70%; float: left; height: 100%;" class="table">
<div style="margin:0px;" class="tcell">Text1<br/>Multiple</div>
</div>
<ul style="float: right; height:100%; width: 30%;">
<li style=" height:50%; background:#ffffff; width: 100%" class="table">
<p style=" margin: 0px;" class="tcell">
Text2
</p>
</li>
<li style=" height:50%; background:#fff465; width: 100%" class="table">
<p style=" margin: 0px;" class="tcell">
Text3
</p>
</li>
</ul>
</li>
` this is SO bad! – Rahul Desai Nov 19 '14 at 12:18Text