diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..a882442
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,7 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 4
diff --git a/lib/main.js b/lib/main.js
index 9613420..07ff7e0 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -26,33 +26,41 @@ Color.prototype.similarTo = function(other) {
     return this.difference(other) < 2.3;
 };
 
-var functions = {
-    identity: function(color, target) {
-        return {
-            color: color,
-            difference: target.difference(color),
-            format: "@input"
-        };
-    },
-    lighten: function(color, target) {
-        var lighten = registry.get("lighten");
+function suggestParameterFunction(functionName) {
+    return function(color, target) {
+        var func = registry.get(functionName);
         var amount = { value: 1 };
 
         var result = [];
 
-        for (var val = 1; val <= 50; val++) {
+        for (var val = 1; val <= 100; val++) {
             amount.value = val;
 
-            var newColor = lighten(color, amount);
+            var newColor = func(color, amount);
+            var difference = target.difference(newColor);
 
             result.push({
                 color: newColor,
-                difference: target.difference(newColor),
-                format: "lighten(@input, " + amount.value + "%)"
+                difference: difference,
+                format: functionName + "(@input, " + amount.value + "%)"
             });
+
+            if (difference < 0.05) {
+                break;
+            }
         }
 
         return best(result, target)[0];
+    };
+}
+
+var functions = {
+    identity: function(color, target) {
+        return {
+            color: color,
+            difference: target.difference(color),
+            format: "@input"
+        };
     },
     contrast: function(color, target) {
         var contrast = registry.get("contrast");
@@ -62,7 +70,11 @@ var functions = {
             difference: target.difference(result),
             format: "contrast(@input)"
         };
-    }
+    },
+    lighten: suggestParameterFunction("lighten"),
+    darken: suggestParameterFunction("darken"),
+    desaturate: suggestParameterFunction("desaturate"),
+    saturate: suggestParameterFunction("saturate")
 };
 
 function best(results, target) {
diff --git a/test/main.js b/test/main.js
index aca50ce..938ec0d 100644
--- a/test/main.js
+++ b/test/main.js
@@ -5,7 +5,13 @@ describe("whichcolorfunction", function(){
   describe("#suggest()", function(){
     var suggestion;
     function firstFormat(from, to) {
-        return suggest(from, to)[0].format;
+        var suggestions = suggest(from, to);
+
+        if (!suggestions.length) {
+            throw new Error("Nothing suggested!");
+        }
+
+        return suggestions[0].format;
     }
     assert.contains = function(haystack, needle, message) {
         assert(haystack.indexOf(needle) > -1, message ||
@@ -29,5 +35,20 @@ describe("whichcolorfunction", function(){
       suggestion = firstFormat("000000", "050505");
       assert.contains(suggestion, "lighten(@input, 2%)");
     });
+    it("should suggest darken", function() {
+      suggestion = firstFormat("cccccc", "c9c9c9");
+      assert.contains(suggestion, "darken(@input, 1%)");
+
+      suggestion = firstFormat("cccccc", "c4c4c4");
+      assert.contains(suggestion, "darken(@input, 3%)");
+    });
+    it("should suggest desaturate", function() {
+      suggestion = firstFormat("80e619", "80cc33");
+      assert.contains(suggestion, "desaturate(@input, 20%)");
+    });
+    it("should suggest saturate", function() {
+      suggestion = firstFormat("80e619", "80ff00");
+      assert.contains(suggestion, "saturate(@input, 20%)");
+    });
   });
 });