diff --git a/d3/d3.d.ts b/d3/d3.d.ts
index 382a958758..daa53f67c5 100644
--- a/d3/d3.d.ts
+++ b/d3/d3.d.ts
@@ -944,7 +944,18 @@ declare module D3 {
                 iso: TimeFormat;
             };
 
-            scale(): Scale.TimeScale;
+            scale: {
+                /**
+                * Constructs a new time scale with the default domain and range;
+                * the ticks and tick format are configured for local time.
+                */
+                (): Scale.TimeScale;
+                /**
+                * Constructs a new time scale with the default domain and range;
+                * the ticks and tick format are configured for UTC time.
+                */
+                utc(): Scale.TimeScale;
+            };
         }
 
         export interface Range {
@@ -1400,7 +1411,7 @@ declare module D3 {
             */
             r: number;
             /**
-            * the greeb color channel.
+            * the green color channel.
             */
             g: number;
             /**
@@ -1414,6 +1425,18 @@ declare module D3 {
         }
 
         export interface HSLColor extends Color{
+            /**
+            * hue
+            */
+            h: number;
+            /**
+            * saturation
+            */
+            s: number;
+            /**
+            * lightness
+            */
+            l: number;
             /**
             * convert from HSL to RGB.
             */
@@ -1421,6 +1444,18 @@ declare module D3 {
         }
 
         export interface LABColor extends Color{
+            /**
+            * lightness
+            */
+            l: number;
+            /**
+            * a-dimension
+            */
+            a: number;
+            /**
+            * b-dimension
+            */
+            b: number;
             /**
             * convert from LAB to RGB.
             */
@@ -1428,6 +1463,18 @@ declare module D3 {
         }
 
         export interface HCLColor extends Color{
+            /**
+            * hue
+            */
+            h: number;
+            /**
+            * chroma
+            */
+            c: number;
+            /**
+            * luminance
+            */
+            l: number;
             /**
             * convert from HCL to RGB.
             */
@@ -2634,9 +2681,11 @@ declare module D3 {
 
         export interface Zoom {
             /**
-            * Execute zoom method
+            * Applies the zoom behavior to the specified selection,
+            * registering the necessary event listeners to support
+            * panning and zooming.
             */
-            (): any;
+            (selection: Selection): void;
 
             /**
             * Registers a listener to receive events