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</code></pre>
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<p>The <code>useColorScheme</code> React hook provides and subscribes to color scheme updates from the <a href="appearance"><code>Appearance</code></a> module. The return value indicates the current user preferred color scheme. The value may be updated later, either through direct user action (e.g. theme selection in device settings) or on a schedule (e.g. light and dark themes that follow the day/night cycle).</p>
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<p>Supported color schemes:</p>
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<ul>
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<li><code>light</code>: The user prefers a light color theme.</li>
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<li><code>dark</code>: The user prefers a dark color theme.</li>
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<li>null: The user has not indicated a preferred color theme.</li>
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</ul>
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<pre><code class="hljs css language-jsx"><span class="token keyword">import</span> <span class="token punctuation">{</span> Text<span class="token punctuation">,</span> useColorScheme <span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'react-native'</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> <span class="token function-variable function">MyComponent</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
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<span class="token keyword">const</span> colorScheme <span class="token operator">=</span> <span class="token function">useColorScheme</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">return</span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Text</span></span><span class="token punctuation">></span></span><span class="token plain-text">useColorScheme(): </span><span class="token punctuation">{</span>colorScheme<span class="token punctuation">}</span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span><span class="token class-name">Text</span></span><span class="token punctuation">></span></span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span><span class="token punctuation">;</span>
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</code></pre>
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<p>You can find a complete example that demonstrates the use of this hook alongside a React context to add support for light and dark themes to your application in <a href="https://github.com/facebook/react-native/blob/master/RNTester/js/examples/Appearance/AppearanceExample.js"><code>AppearanceExample.js</code></a>.</p>
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