Using variables w/in a namespace

namespaced_variables.less

#forms {
  @input: #454545;
  @input_border: #CCCCCC;
}

/* then, somewhere later try to use that */

fieldset {
  input {
    color: #forms > @input; /* maybe #forms[@input] is a better syntax?
    border: 1px solid #forms > @input_border;
}