<h3 dir="auto">Problem description</h3>
<p dir="auto">With 0.18.3 version my TextFields lose custom colors. After downgrading to 0.18.2 colors work as expected.<br>
As I see, it's related to <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="233906100" data-permission-text="Title is private" data-url="https://github.com/mui/material-ui/issues/7065" data-hovercard-type="pull_request" data-hovercard-url="/mui/material-ui/pull/7065/hovercard" href="https://github.com/mui/material-ui/pull/7065">#7065</a></p>
<h3 dir="auto">Link to minimal working code that reproduces the issue</h3>
<p dir="auto"><a href="https://www.webpackbin.com/bins/-KnEbDVKdLKisHPScLox" rel="nofollow">https://www.webpackbin.com/bins/-KnEbDVKdLKisHPScLox</a></p>
<h3 dir="auto">Versions</h3>
<ul dir="auto">
<li>Material-UI: 0.18.3</li>
<li>React: 15.5.4</li>
<li>Browser: Chrome 58.0.3029.110 (64-bit) (windows 10)</li>
</ul>
<p dir="auto">Material UI versions: 0.18.1 and 0.18.3. (I didn't test 0.18.2)</p>
<div class="highlight highlight-source-js notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="                &lt;TextField
                    className=&quot;app-bar-searchbar&quot;
                    hintStyle={{ color: grey300, fontSize: '12px' }}
                    inputStyle={{ color: white, fontSize: '12px' }}
                    underlineFocusStyle={{ borderColor: tealA400 }}
                    underlineStyle={{ borderColor: tealA400 }}
                    onChange={this.handleInputChange}
                    onKeyPress={this.handleKeyPress}
                    value={this.state.search}
                    errorText={this.state.searchErrorText}
                    hintText=&quot;Suche...&quot;
                /&gt;"><pre class="notranslate">                <span class="pl-c1">&lt;</span><span class="pl-ent">TextField</span>
                    <span class="pl-c1">className</span><span class="pl-c1">=</span><span class="pl-s">"app-bar-searchbar"</span>
                    <span class="pl-c1">hintStyle</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-kos">{</span> <span class="pl-c1">color</span>: <span class="pl-s1">grey300</span><span class="pl-kos">,</span> <span class="pl-c1">fontSize</span>: <span class="pl-s">'12px'</span> <span class="pl-kos">}</span><span class="pl-kos">}</span>
                    <span class="pl-c1">inputStyle</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-kos">{</span> <span class="pl-c1">color</span>: <span class="pl-s1">white</span><span class="pl-kos">,</span> <span class="pl-c1">fontSize</span>: <span class="pl-s">'12px'</span> <span class="pl-kos">}</span><span class="pl-kos">}</span>
                    <span class="pl-c1">underlineFocusStyle</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-kos">{</span> <span class="pl-c1">borderColor</span>: <span class="pl-s1">tealA400</span> <span class="pl-kos">}</span><span class="pl-kos">}</span>
                    <span class="pl-c1">underlineStyle</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-kos">{</span> <span class="pl-c1">borderColor</span>: <span class="pl-s1">tealA400</span> <span class="pl-kos">}</span><span class="pl-kos">}</span>
                    <span class="pl-c1">onChange</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-smi">this</span><span class="pl-kos">.</span><span class="pl-c1">handleInputChange</span><span class="pl-kos">}</span>
                    <span class="pl-c1">onKeyPress</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-smi">this</span><span class="pl-kos">.</span><span class="pl-c1">handleKeyPress</span><span class="pl-kos">}</span>
                    <span class="pl-c1">value</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-smi">this</span><span class="pl-kos">.</span><span class="pl-c1">state</span><span class="pl-kos">.</span><span class="pl-c1">search</span><span class="pl-kos">}</span>
                    <span class="pl-c1">errorText</span><span class="pl-c1">=</span><span class="pl-kos">{</span><span class="pl-smi">this</span><span class="pl-kos">.</span><span class="pl-c1">state</span><span class="pl-kos">.</span><span class="pl-c1">searchErrorText</span><span class="pl-kos">}</span>
                    <span class="pl-c1">hintText</span><span class="pl-c1">=</span><span class="pl-s">"Suche..."</span>
                <span class="pl-c1">/</span><span class="pl-c1">&gt;</span></pre></div>
<p dir="auto">The text color is black instead of white.</p>