JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//code.jquery.com/jquery-3.3.1.slim.min.js"></script>
<link rel="stylesheet" href="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js"></script>
<script src="//stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css">
<section id="home_univers">
    <div class="container">
        <div class="row">
            <div class="col-lg-4">
                    <img alt="Animaux de compagnie" src="http:/placehold.it/450x210" alt="">

                    <div class="test"><h3 class="bg_rose">aaaaaaa aa aaaaaaaaa</h3></div>
            </div>
            <!-- /.col-lg-4 -->
            <div class="col-lg-4">
                    <img alt="Chevaux" src="http:/placehold.it/450x210" alt="">
                <div class="test"><h3 class="bg_vert">aaaaaaa</h3></div>
            </div>
            <!-- /.col-lg-4 -->
            <div class="col-lg-4">
                    <img alt="Animaux de rente" src="http:/placehold.it/450x210" alt="">
                    <div class="test"><h3 class="bg_blue">aaaaaaa aa aaaaa</h3></div>
            </div>
            <!-- /.col-lg-4 -->
        </div>
        <!-- /.row -->
    </div>
    <!-- /.container -->
</section>

CSS

@import url('https://fonts.googleapis.com/css?family=Lato:400,700,900');

.orange {
    color: #ffba00;
}

.bg_orange {
    background-color: #ffba00;
}

.blue {
    color: #0033a0;
}

.bg_blue {
    background-color: #0033a0;
}

.rose {
    color: #ff7a6d;
}

.bg_rose {
    background-color: #ff7a6d;
}

.vert {
    color: #8dad20;
}

.bg_vert {
    background-color: #8dad20;
}

#home_univers {
    padding-top: 85px;
    padding-bottom: 85px;
}

#home_univers h3 {
    text-transform: uppercase;
    color: #fff;
    font-size: 24px;
    text-align: center;
    padding-top: 15px;
    padding-bottom: 15px;
    margin-bottom: 0;
}
#home_univers img {
    width:100%;
}