背景色とシンプル矢印

HTML

<a href="">私たちについて</a>

CSS

a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 30px;
  width: 260px;
  color: #333;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  background-color: #90be70;
  border-radius: 40px;
}

a::after {
  content: '';
  width: 10px;
  height: 10px;
  border-top: 2px solid #2b550e;
  border-right: 2px solid #2b550e;
  transform: rotate(45deg);
}