bs隙間系4

index.html

<div class="container" style="background-color: red; padding: 10px;">
    <div class="row" style="background-color: green; margin-left: 0; margin-right: 0;">
        <div class="col-sm-4" style="background-color: blue; padding: 0;"> <!-- padding:0指定-->
            <img src="./images/img1.jpg">
        </div>
        <div class="col-sm-4" style="background-color: yellow; padding: 0;"> <!-- padding:0指定-->
            <img src="./images/img4.jpg">
        </div>
        <div class="col-sm-4" style="background-color: purple; padding: 0;"> <!-- padding:0指定-->
            <img src="./images/img5.jpg">
        </div>
    </div>
</div>