因為這是 Bootstrap5.3 的新增功能，所以必須下載並載入 Bootstrap5.3 的相關檔案，另外還需要載入一個色彩模式切換器 color-modes.js 才能順利用作，預設式亮色主題，與法是 data-bs-theme="色彩模式"，具體作法入下：
1、色彩模式分為亮色(light)、深色(dark)、自動(auto)
2、如果你只要在某組件使用色彩模式的話、則只需在該組件外層的容器上加上 data-bs-theme="light or dark" 即可
3、如果你想在整個頁面使用色彩模式的話、則需要在 <html> 標籤內加上 data-bs-theme="auto or light or dark"，例如： <html data-bs-theme="auto">
4、色彩模式切換器按鈕的代碼如下：
<svg xmlns="http://www.w3.org/2000/svg" style="display: none;"> <symbol id="check2" viewBox="0 0 16 16"> <path d="M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z" /> </symbol> <symbol id="circle-half" viewBox="0 0 16 16"> <path d="M8 15A7 7 0 1 0 8 1v14zm0 1A8 8 0 1 1 8 0a8 8 0 0 1 0 16z" /> </symbol> <symbol id="moon-stars-fill" viewBox="0 0 16 16"> <path d="M6 .278a.768.768 0 0 1 .08.858 7.208 7.208 0 0 0-.878 3.46c0 4.021 3.278 7.277 7.318 7.277.527 0 1.04-.055 1.533-.16a.787.787 0 0 1 .81.316.733.733 0 0 1-.031.893A8.349 8.349 0 0 1 8.344 16C3.734 16 0 12.286 0 7.71 0 4.266 2.114 1.312 5.124.06A.752.752 0 0 1 6 .278z" /> <path d="M10.794 3.148a.217.217 0 0 1 .412 0l.387 1.162c.173.518.579.924 1.097 1.097l1.162.387a.217.217 0 0 1 0 .412l-1.162.387a1.734 1.734 0 0 0-1.097 1.097l-.387 1.162a.217.217 0 0 1-.412 0l-.387-1.162A1.734 1.734 0 0 0 9.31 6.593l-1.162-.387a.217.217 0 0 1 0-.412l1.162-.387a1.734 1.734 0 0 0 1.097-1.097l.387-1.162zM13.863.099a.145.145 0 0 1 .274 0l.258.774c.115.346.386.617.732.732l.774.258a.145.145 0 0 1 0 .274l-.774.258a1.156 1.156 0 0 0-.732.732l-.258.774a.145.145 0 0 1-.274 0l-.258-.774a1.156 1.156 0 0 0-.732-.732l-.774-.258a.145.145 0 0 1 0-.274l.774-.258c.346-.115.617-.386.732-.732L13.863.1z" /> </symbol> <symbol id="sun-fill" viewBox="0 0 16 16"> <path d="M8 12a4 4 0 1 0 0-8 4 4 0 0 0 0 8zM8 0a.5.5 0 0 1 .5.5v2a.5.5 0 0 1-1 0v-2A.5.5 0 0 1 8 0zm0 13a.5.5 0 0 1 .5.5v2a.5.5 0 0 1-1 0v-2A.5.5 0 0 1 8 13zm8-5a.5.5 0 0 1-.5.5h-2a.5.5 0 0 1 0-1h2a.5.5 0 0 1 .5.5zM3 8a.5.5 0 0 1-.5.5h-2a.5.5 0 0 1 0-1h2A.5.5 0 0 1 3 8zm10.657-5.657a.5.5 0 0 1 0 .707l-1.414 1.415a.5.5 0 1 1-.707-.708l1.414-1.414a.5.5 0 0 1 .707 0zm-9.193 9.193a.5.5 0 0 1 0 .707L3.05 13.657a.5.5 0 0 1-.707-.707l1.414-1.414a.5.5 0 0 1 .707 0zm9.193 2.121a.5.5 0 0 1-.707 0l-1.414-1.414a.5.5 0 0 1 .707-.707l1.414 1.414a.5.5 0 0 1 0 .707zM4.464 4.465a.5.5 0 0 1-.707 0L2.343 3.05a.5.5 0 1 1 .707-.707l1.414 1.414a.5.5 0 0 1 0 .708z" /> </symbol> </svg> <button class="btn btn-primary py-2 ms-2 dropdown-toggle d-flex align-items-center" id="bd-theme" type="button" aria-expanded="false" data-bs-toggle="dropdown" aria-label="色彩模式"> <svg class="bi my-1 theme-icon-active" width="1em" height="1em"> <use href="#circle-half"></use> </svg> <span id="bd-theme-text">色彩模式</span> </button> <ul class="dropdown-menu dropdown-menu-end shadow" aria-labelledby="bd-theme-text"> <li> <button type="button" class="dropdown-item d-flex align-items-center" data-bs-theme-value="light" aria-pressed="false"> <svg class="bi me-2 opacity-50 theme-icon" width="1em" height="1em"> <use href="#sun-fill"></use> </svg> 亮色 <svg class="bi ms-auto d-none" width="1em" height="1em"> <use href="#check2"></use> </svg> </button> </li> <li> <button type="button" class="dropdown-item d-flex align-items-center" data-bs-theme-value="dark" aria-pressed="false"> <svg class="bi me-2 opacity-50 theme-icon" width="1em" height="1em"> <use href="#moon-stars-fill"></use> </svg> 暗色 <svg class="bi ms-auto d-none" width="1em" height="1em"> <use href="#check2"></use> </svg> </button> </li> <li> <button type="button" class="dropdown-item d-flex align-items-center active" data-bs-theme-value="auto" aria-pressed="true"> <svg class="bi me-2 opacity-50 theme-icon" width="1em" height="1em"> <use href="#circle-half"></use> </svg> 自動 <svg class="bi ms-auto d-none" width="1em" height="1em"> <use href="#check2"></use> </svg> </button> </li> </ul>
5、最後記得載入 <script src="js/color-modes.js"></script>
效果展示
因為這是 Bootstrap5.3 的新增功能，所以必須下載並載入 Bootstrap5.3 的相關檔案，另外還需要載入一個色彩模式切換器 color-modes.js 才能順利用作，預設式亮色主題，與法是 data-bs-theme="色彩模式"，具體作法入下：
1、色彩模式分為亮色(light)、深色(dark)、自動(auto)
2、如果你只要在某組件使用色彩模式的話、則只需在該組件外層的容器上加上 data-bs-theme="light or dark" 即可
3、如果你想在整個頁面使用色彩模式的話、則需要在 <html> 標籤內加上 data-bs-theme="auto or light or dark"，例如： <html data-bs-theme="auto">
4、色彩模式切換器按鈕的代碼如下：
<svg xmlns="http://www.w3.org/2000/svg" style="display: none;"> <symbol id="check2" viewBox="0 0 16 16"> <path d="M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z" /> </symbol> <symbol id="circle-half" viewBox="0 0 16 16"> <path d="M8 15A7 7 0 1 0 8 1v14zm0 1A8 8 0 1 1 8 0a8 8 0 0 1 0 16z" /> </symbol> <symbol id="moon-stars-fill" viewBox="0 0 16 16"> <path d="M6 .278a.768.768 0 0 1 .08.858 7.208 7.208 0 0 0-.878 3.46c0 4.021 3.278 7.277 7.318 7.277.527 0 1.04-.055 1.533-.16a.787.787 0 0 1 .81.316.733.733 0 0 1-.031.893A8.349 8.349 0 0 1 8.344 16C3.734 16 0 12.286 0 7.71 0 4.266 2.114 1.312 5.124.06A.752.752 0 0 1 6 .278z" /> <path d="M10.794 3.148a.217.217 0 0 1 .412 0l.387 1.162c.173.518.579.924 1.097 1.097l1.162.387a.217.217 0 0 1 0 .412l-1.162.387a1.734 1.734 0 0 0-1.097 1.097l-.387 1.162a.217.217 0 0 1-.412 0l-.387-1.162A1.734 1.734 0 0 0 9.31 6.593l-1.162-.387a.217.217 0 0 1 0-.412l1.162-.387a1.734 1.734 0 0 0 1.097-1.097l.387-1.162zM13.863.099a.145.145 0 0 1 .274 0l.258.774c.115.346.386.617.732.732l.774.258a.145.145 0 0 1 0 .274l-.774.258a1.156 1.156 0 0 0-.732.732l-.258.774a.145.145 0 0 1-.274 0l-.258-.774a1.156 1.156 0 0 0-.732-.732l-.774-.258a.145.145 0 0 1 0-.274l.774-.258c.346-.115.617-.386.732-.732L13.863.1z" /> </symbol> <symbol id="sun-fill" viewBox="0 0 16 16"> <path d="M8 12a4 4 0 1 0 0-8 4 4 0 0 0 0 8zM8 0a.5.5 0 0 1 .5.5v2a.5.5 0 0 1-1 0v-2A.5.5 0 0 1 8 0zm0 13a.5.5 0 0 1 .5.5v2a.5.5 0 0 1-1 0v-2A.5.5 0 0 1 8 13zm8-5a.5.5 0 0 1-.5.5h-2a.5.5 0 0 1 0-1h2a.5.5 0 0 1 .5.5zM3 8a.5.5 0 0 1-.5.5h-2a.5.5 0 0 1 0-1h2A.5.5 0 0 1 3 8zm10.657-5.657a.5.5 0 0 1 0 .707l-1.414 1.415a.5.5 0 1 1-.707-.708l1.414-1.414a.5.5 0 0 1 .707 0zm-9.193 9.193a.5.5 0 0 1 0 .707L3.05 13.657a.5.5 0 0 1-.707-.707l1.414-1.414a.5.5 0 0 1 .707 0zm9.193 2.121a.5.5 0 0 1-.707 0l-1.414-1.414a.5.5 0 0 1 .707-.707l1.414 1.414a.5.5 0 0 1 0 .707zM4.464 4.465a.5.5 0 0 1-.707 0L2.343 3.05a.5.5 0 1 1 .707-.707l1.414 1.414a.5.5 0 0 1 0 .708z" /> </symbol> </svg> <button class="btn btn-primary py-2 ms-2 dropdown-toggle d-flex align-items-center" id="bd-theme" type="button" aria-expanded="false" data-bs-toggle="dropdown" aria-label="色彩模式"> <svg class="bi my-1 theme-icon-active" width="1em" height="1em"> <use href="#circle-half"></use> </svg> <span id="bd-theme-text">色彩模式</span> </button> <ul class="dropdown-menu dropdown-menu-end shadow" aria-labelledby="bd-theme-text"> <li> <button type="button" class="dropdown-item d-flex align-items-center" data-bs-theme-value="light" aria-pressed="false"> <svg class="bi me-2 opacity-50 theme-icon" width="1em" height="1em"> <use href="#sun-fill"></use> </svg> 亮色 <svg class="bi ms-auto d-none" width="1em" height="1em"> <use href="#check2"></use> </svg> </button> </li> <li> <button type="button" class="dropdown-item d-flex align-items-center" data-bs-theme-value="dark" aria-pressed="false"> <svg class="bi me-2 opacity-50 theme-icon" width="1em" height="1em"> <use href="#moon-stars-fill"></use> </svg> 暗色 <svg class="bi ms-auto d-none" width="1em" height="1em"> <use href="#check2"></use> </svg> </button> </li> <li> <button type="button" class="dropdown-item d-flex align-items-center active" data-bs-theme-value="auto" aria-pressed="true"> <svg class="bi me-2 opacity-50 theme-icon" width="1em" height="1em"> <use href="#circle-half"></use> </svg> 自動 <svg class="bi ms-auto d-none" width="1em" height="1em"> <use href="#check2"></use> </svg> </button> </li> </ul>
5、最後記得載入 <script src="js/color-modes.js"></script>
效果展示
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