<button class="btn">Submit</button>
$green: #26A98D;
.btn {
  width: 100px;
  height: 30px;
  font-size: 12px;
  border: none;
  background: $green;
  color: lighten($green, 60%);
  cursor: pointer;
  &:hover {
   opacity: 0.6;
   transition: 0.2s all ease;
  }
}

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