--- a/mercurial/graphmod.py	Sun Jan 22 19:35:26 2012 +0700
+++ b/mercurial/graphmod.py	Sun Jan 22 19:47:03 2012 +0700
@@ -18,6 +18,7 @@
 """
 
 from mercurial.node import nullrev
+import re
 
 CHANGESET = 'C'
 
@@ -92,7 +93,8 @@
         gdict = config.setdefault(branch, {})
 
         # Validation
-        if (setting == "width" and val.isdigit() and 0 < int(val) < 30):
+        if ((setting == "width" and val.isdigit() and 0 < int(val) < 30) or
+                (setting == "color" and re.match('^[0-9a-fA-F]{6}$', val))):
             gdict[setting] = val
         else:
             continue

--- a/mercurial/help/config.txt	Sun Jan 22 19:35:26 2012 +0700
+++ b/mercurial/help/config.txt	Sun Jan 22 19:47:03 2012 +0700
@@ -537,7 +537,7 @@
 ``graph``
 """""""""
 
-This section specifies line width to visually distinguish 
+This section specifies line width and color to visually distinguish 
 "main branch" or trunk in central repository graph.
 
 Format branch_name.attribute = value.
@@ -546,12 +546,17 @@
   [graph]
   # 2px width
   default.width = 2
+  # red color
+  default.color = FF0000
 
 Supported arguments:
 
 ``width``
   Set width in px. Width is number 0-99.
 
+``color``
+  Color is six hexadecimal digits RRGGBB.
+
 Known issues:
   If line style doesn't change, try to clear browser cache.
 

--- a/mercurial/templates/static/mercurial.js	Sun Jan 22 19:35:26 2012 +0700
+++ b/mercurial/templates/static/mercurial.js	Sun Jan 22 19:47:03 2012 +0700
@@ -58,19 +58,25 @@
 		
 		// Set the colour.
 		//
-		// Picks a distinct colour based on an internal wheel; the bg
+		// If color is hex string "FFFFFF" then append sharp and apply as is 
+		// If color is number
+		// picks a distinct colour based on an internal wheel; the bg
 		// parameter provides the value that should be assigned to the 'zero'
 		// colours and the fg parameter provides the multiplier that should be
 		// applied to the foreground colours.
-		
-		color %= colors.length;
-		var red = (colors[color][0] * fg) || bg;
-		var green = (colors[color][1] * fg) || bg;
-		var blue = (colors[color][2] * fg) || bg;
-		red = Math.round(red * 255);
-		green = Math.round(green * 255);
-		blue = Math.round(blue * 255);
-		var s = 'rgb(' + red + ', ' + green + ', ' + blue + ')';
+		var s;
+		if(typeof color == "string"){
+			s = "#"+color;
+		}else{ //typeof color == "number"
+			color %= colors.length;
+			var red = (colors[color][0] * fg) || bg;
+			var green = (colors[color][1] * fg) || bg;
+			var blue = (colors[color][2] * fg) || bg;
+			red = Math.round(red * 255);
+			green = Math.round(green * 255);
+			blue = Math.round(blue * 255);
+			s = 'rgb(' + red + ', ' + green + ', ' + blue + ')';
+		}
 		this.ctx.strokeStyle = s;
 		this.ctx.fillStyle = s;
 		return s;
@@ -116,6 +122,10 @@
 				if(line[3] && line[3]['width']){
 					this.ctx.lineWidth = line[3]['width'];
 				}
+				// Color if exists
+				if(line[3] && line[3]['color']){
+					color = line[3]['color'];
+				}
 				this.edge(x0, y0, x1, y1, color);
 				this.ctx.lineWidth = 1;
 			}

--- a/tests/test-hgweb-commands.t	Sun Jan 22 19:35:26 2012 +0700
+++ b/tests/test-hgweb-commands.t	Sun Jan 22 19:47:03 2012 +0700
@@ -31,6 +31,7 @@
   $ echo [graph] >> .hg/hgrc
   $ echo default.width = 3 >> .hg/hgrc
   $ echo stable.width = 3 >> .hg/hgrc
+  $ echo stable.color = FF0000 >> .hg/hgrc
   $ hg serve --config server.uncompressed=False -n test -p $HGPORT -d --pid-file=hg.pid -E errors.log
   $ cat hg.pid >> $DAEMON_PIDS
 
@@ -956,7 +957,7 @@
   <script>
   <!-- hide script content
   
-  var data = [["ba87b23d29ca", [0, 1], [[0, 0, 1, {"width": "3"}]], "branch", "test", "1970-01-01", ["unstable", true], ["tip"], ["something"]], ["1d22e65f027e", [0, 1], [[0, 0, 1, {"width": "3"}]], "branch", "test", "1970-01-01", ["stable", true], [], []], ["a4f92ed23982", [0, 1], [[0, 0, 1, {"width": "3"}]], "Added tag 1.0 for changeset 2ef0ac749a14", "test", "1970-01-01", ["default", true], [], []], ["2ef0ac749a14", [0, 1], [], "base", "test", "1970-01-01", ["default", false], ["1.0"], ["anotherthing"]]];
+  var data = [["ba87b23d29ca", [0, 1], [[0, 0, 1, {"color": "FF0000", "width": "3"}]], "branch", "test", "1970-01-01", ["unstable", true], ["tip"], ["something"]], ["1d22e65f027e", [0, 1], [[0, 0, 1, {"width": "3"}]], "branch", "test", "1970-01-01", ["stable", true], [], []], ["a4f92ed23982", [0, 1], [[0, 0, 1, {"width": "3"}]], "Added tag 1.0 for changeset 2ef0ac749a14", "test", "1970-01-01", ["default", true], [], []], ["2ef0ac749a14", [0, 1], [], "base", "test", "1970-01-01", ["default", false], ["1.0"], ["anotherthing"]]];
   var graph = new Graph();
   graph.scale(39);
   
@@ -1223,9 +1224,8 @@
 
   $ "$TESTDIR/get-with-headers.py" 127.0.0.1:$HGPORT '/graph/' \
   >     | grep '^var data ='
-  var data = [["548001d11f45", [0, 1], [[0, 0, 1, null]], "\u80fd", "test", "1970-01-01", ["unstable", true], ["tip"], ["something"]], ["ba87b23d29ca", [0, 1], [[0, 0, 1, {"width": "3"}]], "branch", "test", "1970-01-01", ["unstable", false], [], []], ["1d22e65f027e", [0, 1], [[0, 0, 1, {"width": "3"}]], "branch", "test", "1970-01-01", ["stable", true], [], []], ["a4f92ed23982", [0, 1], [[0, 0, 1, {"width": "3"}]], "Added tag 1.0 for changeset 2ef0ac749a14", "test", "1970-01-01", ["default", true], [], []], ["2ef0ac749a14", [0, 1], [], "base", "test", "1970-01-01", ["default", false], ["1.0"], ["anotherthing"]]];
+  var data = [["548001d11f45", [0, 1], [[0, 0, 1, null]], "\u80fd", "test", "1970-01-01", ["unstable", true], ["tip"], ["something"]], ["ba87b23d29ca", [0, 1], [[0, 0, 1, {"color": "FF0000", "width": "3"}]], "branch", "test", "1970-01-01", ["unstable", false], [], []], ["1d22e65f027e", [0, 1], [[0, 0, 1, {"width": "3"}]], "branch", "test", "1970-01-01", ["stable", true], [], []], ["a4f92ed23982", [0, 1], [[0, 0, 1, {"width": "3"}]], "Added tag 1.0 for changeset 2ef0ac749a14", "test", "1970-01-01", ["default", true], [], []], ["2ef0ac749a14", [0, 1], [], "base", "test", "1970-01-01", ["default", false], ["1.0"], ["anotherthing"]]];
 
 ERRORS ENCOUNTERED
 
   $ cat errors.log
-