Placeholder Text styling mixin (src: https://github.com/web-design-weekly/sass-mixins/blob/master/mixins.scss)

placeholder-mixin

@mixin placeholder-color($color){
  &.placeholder{
    color: $color
  }

  &:-moz-placeholder{
    color: $color
  }
    
  &::-webkit-input-placeholder{
    color: $color
  }

  &:-ms-input-placeholder{
    color: $color
  }
}

/* Usage */

input{
  @include placeholder-color(#FA4A4A)
}