<div class="main">
<div class="txt-block">Дизайн и верстка</div>
<div class="txt-block"><span>сайтов</span> с нуля</div>
<div class="txt-block">для вас</div>
<div>

.main {
  background: #3333b5;
  padding: 30px 50px;
  width: fit-content;
  height: auto;
}
.txt-block {
  position: relative;
  color: #fff;
  font-weight: 700;
  font-size: 30px;
  z-index: 1;
  width: fit-content;
  margin-bottom: -5%;
}
.txt-block span {
  color: cyan;
}
.txt-block:before {
  position: absolute;
  z-index: -1;
  width: 107%;
  height: 90%;
  content: '';
  background: #000;
  left: -6px;
  top: 15px;
}