Generated by SassMeister.com.

SassMeister-input.sass

// ----
// Sass (v3.4.21)
// Compass (v1.0.3)
// ----

$red: #ff0000

$primary-colors: ("red": $red, "green": #00ff00, "blue": #0000ff)

// Key and value together
@each $color in $primary-colors
  .thing
    content: "#{$color}"

// Key and value separate
@each $color-name, $color-code in $primary-colors
  .color-#{$color-name}
    background: $color-code

SassMeister-output.css

.thing {
  content: "red #ff0000";
}

.thing {
  content: "green #00ff00";
}

.thing {
  content: "blue #0000ff";
}

.color-red {
  background: #ff0000;
}

.color-green {
  background: #00ff00;
}

.color-blue {
  background: #0000ff;
}