Save a few bytes.

d3.js

@@ -1620,7 +1620,7 @@
     return v < 16 ? "0" + Math.max(0, v).toString(16) : Math.min(255, v).toString(16);
   }
   function d3_rgb_parse(format, rgb, hsl) {
-    var r = 0, g = 0, b = 0, value, m1, m2, name;
+    var r = 0, g = 0, b = 0, m1, m2, color;
     m1 = /([a-z]+)\((.*)\)/i.exec(format);
     if (m1) {
       m2 = m1[2].split(",");
@@ -1636,22 +1636,19 @@
         }
       }
     }
-    if (name = d3_rgb_names.get(format)) return rgb(name.r, name.g, name.b);
-    if (format != null && format.charAt(0) === "#") {
-      value = parseInt(format.substring(1), 16);
-      if (!isNaN(value)) {
-        if (format.length === 4) {
-          r = (value & 3840) >> 4;
-          r = r >> 4 | r;
-          g = value & 240;
-          g = g >> 4 | g;
-          b = value & 15;
-          b = b << 4 | b;
-        } else if (format.length === 7) {
-          r = (value & 16711680) >> 16;
-          g = (value & 65280) >> 8;
-          b = value & 255;
-        }
+    if (color = d3_rgb_names.get(format)) return rgb(color.r, color.g, color.b);
+    if (format != null && format.charAt(0) === "#" && !isNaN(color = parseInt(format.substring(1), 16))) {
+      if (format.length === 4) {
+        r = (color & 3840) >> 4;
+        r = r >> 4 | r;
+        g = color & 240;
+        g = g >> 4 | g;
+        b = color & 15;
+        b = b << 4 | b;
+      } else if (format.length === 7) {
+        r = (color & 16711680) >> 16;
+        g = (color & 65280) >> 8;
+        b = color & 255;
       }
     }
     return rgb(r, g, b);

src/color/rgb.js

@@ -67,10 +67,9 @@ function d3_rgb_parse(format, rgb, hsl) {
   var r = 0, // red channel; int in [0, 255]
       g = 0, // green channel; int in [0, 255]
       b = 0, // blue channel; int in [0, 255]
-      value,
       m1, // CSS color specification match
       m2, // CSS color specification type (e.g., rgb)
-      name;
+      color;
 
   /* Handle hsl, rgb. */
   m1 = /([a-z]+)\((.*)\)/i.exec(format);
@@ -95,23 +94,21 @@ function d3_rgb_parse(format, rgb, hsl) {
   }
 
   /* Named colors. */
-  if (name = d3_rgb_names.get(format)) return rgb(name.r, name.g, name.b);
+  if (color = d3_rgb_names.get(format)) return rgb(color.r, color.g, color.b);
 
   /* Hexadecimal colors: #rgb and #rrggbb. */
-  if (format != null && format.charAt(0) === "#") {
-    value = parseInt(format.substring(1), 16);
-    if (!isNaN(value)) {
-      if (format.length === 4) {
-        r = (value & 0xf00) >> 4; r = (r >> 4) | r;
-        g = (value & 0xf0); g = (g >> 4) | g;
-        b = (value & 0xf); b = (b << 4) | b;
-      } else if (format.length === 7) {
-        r = (value & 0xff0000) >> 16;
-        g = (value & 0xff00) >> 8;
-        b = (value & 0xff);
-      }
+  if (format != null && format.charAt(0) === "#" && !isNaN(color = parseInt(format.substring(1), 16))) {
+    if (format.length === 4) {
+      r = (color & 0xf00) >> 4; r = (r >> 4) | r;
+      g = (color & 0xf0); g = (g >> 4) | g;
+      b = (color & 0xf); b = (b << 4) | b;
+    } else if (format.length === 7) {
+      r = (color & 0xff0000) >> 16;
+      g = (color & 0xff00) >> 8;
+      b = (color & 0xff);
     }
   }
+
   return rgb(r, g, b);
 }