Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v3.2.4)
// ----

$colourNames: "primary" "secondary" "tertiary";
$colourValues: #f00, #0f0, #00f;

@for $i from 0 to length($colourNames) {
    .color--#{nth($colourNames, $i+1)} {
        color: nth($colourValues, $i+1);
    }
}

SassMeister-output.css

.color--primary {
  color: #f00;
}

.color--secondary {
  color: #0f0;
}

.color--tertiary {
  color: #00f;
}