Deluge: can a field reference itself (instead of specifically referencing itself by name)?

Is Deluge capable of allowing fields to reference themselves, instead of specifically referencing itself by specific name? I.e.

User checks a decision box called "iwantblue". The following script would run "On Update":

if (input.someotherfield == "Blue") {
    alert ("You have already chosen blue; choose another color.");
    self = false;
}

meaning the box would become unchecked after an alert box, instead of:

if (input.someotherfield == "Blue") {
    alert ("You have already chosen blue; choose another color.");
    input.iwantblue = false;
}