就像你可以看到这2张照片，我想删除蓝色时，打开和蓝色边框颜色

<div class="accordion-item">
                                <h2 class="accordion-header" id="flush-heading<?php echo $id; ?>">
                                <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#flush-collapse<?php echo $id; ?>" aria-expanded="false" aria-controls="flush-collapse<?php echo $id; ?>">
                                    <?php echo $row["question"]; ?>
                                </button>
                                </h2>
                                <div id="flush-collapse<?php echo $id; ?>" class="accordion-collapse collapse" aria-labelledby="flush-heading<?php echo $id; ?>" data-bs-parent="#accordionFlushExample">
                                    <div class="accordion-body"><?php echo $row["reponse"]; ?></div>
                                    </div>
                                </div>

谢谢你帮忙，Stef
我在CSS中尝试了一些东西，但没有一个工作