Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v3.2.0-beta.6)
// ----

$colors: (
	"transparent": #000000, // Output is fine (black)
	rgba(0,0,0,0): #000000
);

@each $name, $csscolor in $colors {
	.c-#{$name} {
		background-color: $csscolor;
	}
}

.c {
  color: map-get($colors, transparent);
}

SassMeister-output.css

.c-transparent{background-color:#000000}.c-transparent{background-color:#000000}.c{color:#000000}