<p>
    <a class="btn btn-primary" data-toggle="collapse" href="#collapseExample" role="button" aria-expanded="false" aria-controls="collapseExample">
        Link with href
    </a>
    <button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#collapseExample" aria-expanded="false" aria-controls="collapseExample">
        Button with data-target
    </button>
</p>
<div class="collapse" id="collapseExample">
    <div class="card card-body">
        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim
        keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.
    </div>
</div>
                                                    
                                                

                                                    
<p>
    <a class="btn btn-primary" data-toggle="collapse" href="#multiCollapseExample1" role="button" aria-expanded="false" aria-controls="multiCollapseExample1">Toggle first element</a>
    <button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#multiCollapseExample2" aria-expanded="false" aria-controls="multiCollapseExample2">Toggle second element</button>
    <button class="btn btn-primary" type="button" data-toggle="collapse" data-target=".multi-collapse" aria-expanded="false" aria-controls="multiCollapseExample1 multiCollapseExample2">Toggle both elements</button>
</p>
<div class="row">
    <div class="col">
        <div class="collapse multi-collapse" id="multiCollapseExample1">
            <div class="card card-body">
                Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid.
                Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.
            </div>
        </div>
    </div>
    <div class="col">
        <div class="collapse multi-collapse" id="multiCollapseExample2">
            <div class="card card-body">
                Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid.
                Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.
            </div>
        </div>
    </div>
</div>
                                                    
                                                

Usage

                                                    
<div class="accordion" id="accordionExample">
<div class="card mb-0">
    <div class="card-header p-2" id="headingOne">
        <h2 class="mb-0">
            <button class="btn btn-link" type="button" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
                Collapsible Group Item #1
            </button>
        </h2>
    </div>
    <div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordionExample">
        <div class="card-body">
            Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3
            wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum
            eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla
            assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt
            sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer
            farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus
            labore sustainable VHS.
        </div>
    </div>
</div>
<div class="card mb-0">
    <div class="card-header p-2" id="headingTwo">
        <h2 class="mb-0">
            <button class="btn btn-link collapsed" type="button" data-toggle="collapse" data-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
                Collapsible Group Item #2
            </button>
        </h2>
    </div>
    <div id="collapseTwo" class="collapse" aria-labelledby="headingTwo" data-parent="#accordionExample">
        <div class="card-body">
            Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3
            wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum
            eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla
            assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt
            sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer
            farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus
            labore sustainable VHS.
        </div>
    </div>
</div>
<div class="card mb-0">
    <div class="card-header p-2" id="headingThree">
        <h2 class="mb-0">
            <button class="btn btn-link collapsed" type="button" data-toggle="collapse" data-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
                Collapsible Group Item #3
            </button>
        </h2>
    </div>
    <div id="collapseThree" class="collapse" aria-labelledby="headingThree" data-parent="#accordionExample">
        <div class="card-body">
            Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3
            wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum
            eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla
            assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt
            sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer
            farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus
            labore sustainable VHS.
        </div>
    </div>
</div>
</div>
                                                    
                                                

Usage

For color accordion. Add Class .bg-success or .bg-info e.t.c to card-header

                                                    
<div class="accordion" id="accordionExample">
<div class="card mb-0">
    <div class="card-header bg-success p-2" id="headingOne">
        <h2 class="mb-0">
            <button class="btn btn-link text-white" type="button" data-toggle="collapse" data-target="#collapse4" aria-expanded="true" aria-controls="collapseOne">
                Collapsible Group Item #1
            </button>
        </h2>
    </div>
    <div id="collapse4" class="collapse show" aria-labelledby="headingOne" data-parent="#collapse4">
        <div class="card-body">
            Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad
            squid. 3
            wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt
            laborum
            eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee
            nulla
            assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred
            nesciunt
            sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer
            farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them
            accusamus
            labore sustainable VHS.
        </div>
    </div>
</div>
<div class="card mb-0">
    <div class="card-header bg-info p-2" id="headingThree">
        <h2 class="mb-0">
            <button class="btn btn-link text-white collapsed" type="button" data-toggle="collapse" data-target="#collapse5" aria-expanded="false" aria-controls="collapse5">
                Collapsible Group Item #2
            </button>
        </h2>
    </div>
    <div id="collapse5" class="collapse" aria-labelledby="headingThree" data-parent="#collapse5">
        <div class="card-body">
            Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad
            squid. 3
            wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt
            laborum
            eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee
            nulla
            assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred
            nesciunt
            sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer
            farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them
            accusamus
            labore sustainable VHS.
        </div>
    </div>
</div>
<div class="card mb-0">
    <div class="card-header bg-danger p-2" id="headingThree">
        <h2 class="mb-0">
            <button class="btn btn-link text-white collapsed" type="button" data-toggle="collapse" data-target="#collapse6" aria-expanded="false" aria-controls="collapse6">
                Collapsible Group Item #3
            </button>
        </h2>
    </div>
    <div id="collapse6" class="collapse" aria-labelledby="headingThree" data-parent="#collapse6">
        <div class="card-body">
            Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad
            squid. 3
            wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt
            laborum
            eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee
            nulla
            assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred
            nesciunt
            sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer
            farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them
            accusamus
            labore sustainable VHS.
        </div>
    </div>
</div>
</div>