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How to change the Boostrap 4 Accordion card header color when active

I am trying to change the header color to my $primary color and the text color to white when the tab is active. When the tab is not opened I want it to be my $unactive color for the tab and the font color to be my $primary color. Any help would be great. I am using scss to make it so the site doesnt look like every other bootstrap site.

//app.scss 
// override all variables first
$primary: #fff;
$tertiary: goldenrod;
$secondary: #003e7a;
$unactiveTab: #ebf2fa;
$theme-color: (
"tertiary": $tertiary,
        "unactiveTab": #ebf2fa,
);
.jumbotron {
  background: url('https://www.wctc.edu/_site-images/it-web-and-software-developer-bl.jpg') no-repeat;
  background-size: cover;
  height:460px;
  width: 100%;
  font-weight: bold;
  text-align: center;
  }
.nav-pills{
  background-color: $secondary;
  color: $primary;
}
.card-header{
  color: $secondary;
}
.nav-pills.active{
  background-color: $secondary;

}
.card-header .btn[aria-expanded=true] {
  color: $primary;
  background-color: $secondary;
}
.card-header.btn[aria-expanded=false] {
  color: $secondary;
  background-color: $unactiveTab;
}
.card.show {
  background-color: $secondary;
  color: $primary;
}

//index.html
<div class="container">
<div id="accordion">
    <div class="card">
        <div class="card-header bg-secondary" id="headingOne">
            <h5 class="mb-0">
                <button class="btn btn-link" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
                   Contact us
                </button>
            </h5>
        </div>

        <div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion">
            <div class="card-body">
            <p> <strong>Questions?</strong> We'd love to help! Connect with our Outreach team by filling out our online form or by email at <a href = "mailto:outreach@wctc.edu" style="color: blue; text-decoration: underline">outreach@wctc.edu</a>.</p>
            </div>
        </div>
    </div>
    <div class="card">
        <div class="card-header" id="headingTwo">
            <h5 class="mb-0">
                <button class="btn btn-link collapsed" data-toggle="collapse" data-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
                   Potential Careers
                </button>
            </h5>
        </div>
        <div id="collapseTwo" class="collapse" aria-labelledby="headingTwo" data-parent="#accordion">
            <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">
        <div class="card-header" id="headingThree">
            <h5 class="mb-0">
                <button class="btn btn-link collapsed" data-toggle="collapse" data-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
                    High School Eligibility
                </button>
            </h5>
        </div>
        <div id="collapseThree" class="collapse" aria-labelledby="headingThree" data-parent="#accordion">
            <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">
        <div class="card-header" id="headingFour">
            <h5 class="mb-0">
                <button class="btn btn-link collapsed" data-toggle="collapse" data-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
                    Career Salaries
                </button>
            </h5>
        </div>
        <div id="collapseFour" class="collapse" aria-labelledby="headingFour" data-parent="#accordion">
            <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">
        <div class="card-header" id="headingFive">
            <h5 class="mb-0">
                <button class="btn btn-link collapsed" data-toggle="collapse" data-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
                   Financial Aid
                </button>
            </h5>
        </div>
        <div id="collapseFive" class="collapse" aria-labelledby="headingFive" data-parent="#accordion">
            <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">
        <div class="card-header" id="headingSix">
            <h5 class="mb-0">
                <button class="btn btn-link collapsed" data-toggle="collapse" data-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
                   Which Degree is For Me?
                </button>
            </h5>
        </div>
        <div id="collapseSix" class="collapse" aria-labelledby="headingSix" data-parent="#accordion">
            <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>
</div>
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