<div class="wrapper">
  <div class="box">
    Первый вариант
  </div>
  <div class="box-two">Второй вариант</div>
</div>
.wrapper {
  display: flex;
  justify-content: space-around;
}
.box {
  background: orange;
  width: 400px;
  height: 250px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 34px;
  color: #fff;
  padding: 10px;
  
  // следующее свойство обрезает блок (слабая поддержка)
  clip-path: polygon(25% 0%, 100% 0%, 100% 100%, 0% 100%);
}

.box-two {
  width: 400px;
  height: 250px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 34px;
  color: #fff;
  padding: 10px;
  margin-left: 20px;
  
  position: relative;
  overflow: hidden;
  &:before {
    content: '';
    position: absolute;
    left: 50px;
    z-index: -1;
    width: 100%;
    height: 100%;
    background: orange;
    transform: skewX(-20deg)  
  }
}
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