create a smooth gradient with sass function

smooth-gradient.scss

@function smooth-gradient($direction: 0deg, $color: hsl(0, 0%, 0%)) {
  @return linear-gradient(
    $direction,
    color.change($color, $alpha: 1) 0%,
    color.change($color, $alpha: 0.738) 19%,
    color.change($color, $alpha: 0.541) 34%,
    color.change($color, $alpha: 0.382) 47%,
    color.change($color, $alpha: 0.278) 56.5%,
    color.change($color, $alpha: 0.194) 65%,
    color.change($color, $alpha: 0.126) 73%,
    color.change($color, $alpha: 0.075) 80.2%,
    color.change($color, $alpha: 0.042) 86.1%,
    color.change($color, $alpha: 0.021) 91%,
    color.change($color, $alpha: 0.008) 95.2%,
    color.change($color, $alpha: 0.002) 98.2%,
    transparent 100%,
  );
}