diff --git a/AUTHORS b/AUTHORS
index 9f9f8182e..4e1422feb 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -158,3 +158,5 @@ suggestions:
   Stéphane Pezennec
   Jim B
   Jake Bell
+  Florian Hollerweger
+
diff --git a/ChangeLog b/ChangeLog
index ba29205bf..9ded450f7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -12,6 +12,8 @@ Features
  + Added Feature #1124, which provides a '_show' command that displays all
    configuration defaults and settings, for use by third-party software (thanks
    to Jake Bell).
+ + Added Feature #1099, which supports the 'color.uda.<uda-name>' color rule
+   (thanks to Florian Hollerweger).
  + The 'projects' command now outputs abstract parents and reduces
    repetition by not printing parent names in front of children names.
  + Added framework for testing bash autocompletion.
diff --git a/NEWS b/NEWS
index 62989f562..8c498c9ff 100644
--- a/NEWS
+++ b/NEWS
@@ -15,7 +15,7 @@ New commands in taskwarrior 2.2.0
 
 New configuration options in taskwarrior 2.2.0
 
-  -
+  - New color rule 'color.uda.<uda-name>'.
 
 Newly deprecated features in taskwarrior 2.2.0
   
diff --git a/doc/man/taskrc.5.in b/doc/man/taskrc.5.in
index 3038a980e..ae7935e23 100644
--- a/doc/man/taskrc.5.in
+++ b/doc/man/taskrc.5.in
@@ -844,6 +844,11 @@ Colors any task assigned to project X.
 Colors any task where the description or any annotation contains X.
 .RE
 
+.TP
+.B color.uda.X=on green
+Colors any taks that has the user defined attribute X.
+.RE
+
 .TP
 .B color.error=green
 Colors any of the error messages.
diff --git a/src/Config.cpp b/src/Config.cpp
index 2644477fd..9ed9701e1 100644
--- a/src/Config.cpp
+++ b/src/Config.cpp
@@ -211,6 +211,7 @@ std::string Config::_defaults =
   "color.blocking=white on color6                 # Color of blocking tasks\n"
   "#color.completed=on blue                       # Color of completed tasks\n"
   "#color.deleted=on blue                         # Color of deleted tasks\n"
+  "#color.uda.estimate=on green                   # Color of UDA\n"
 #else
   "color.header=yellow                            # Color of header messages\n"
   "color.footnote=yellow                          # Color of footnote messages\n"
@@ -265,12 +266,13 @@ std::string Config::_defaults =
   "color.blocking=black on bright white           # Color of blocking tasks\n"
   "#color.completed=on blue                       # Color of completed tasks\n"
   "#color.deleted=on blue                         # Color of deleted tasks\n"
+  "#color.uda.estimate=on green                   # Color of UDA\n"
 #endif
   "\n"
   "# Here is the rule precedence order, highest to lowest.\n"
   "# Note that these are just the color rule names, without the leading 'color.'\n"
   "#      and any trailing '.value'.\n"
-  "rule.precedence.color=due.today,active,blocking,blocked,overdue,due,scheduled,keyword.,project.,tag.,recurring,pri.,tagged,completed,deleted\n"
+  "rule.precedence.color=due.today,active,blocking,blocked,overdue,due,scheduled,keyword.,project.,tag.,uda.,recurring,pri.,tagged,completed,deleted\n"
   "\n"
   "# Shadow file support\n"
   "#shadow.file=/tmp/shadow.txt                   # Location of shadow file\n"
diff --git a/src/commands/CmdShow.cpp b/src/commands/CmdShow.cpp
index 92cc1d421..8e80b4695 100644
--- a/src/commands/CmdShow.cpp
+++ b/src/commands/CmdShow.cpp
@@ -229,6 +229,7 @@ int CmdShow::execute (std::string& output)
       if (i->substr (0, 14) != "color.keyword."        &&
           i->substr (0, 14) != "color.project."        &&
           i->substr (0, 10) != "color.tag."            &&
+          i->substr (0, 10) != "color.uda."            &&
           i->substr (0,  8) != "holiday."              &&
           i->substr (0,  7) != "report."               &&
           i->substr (0,  6) != "alias."                &&
diff --git a/src/rules.cpp b/src/rules.cpp
index 97109b68a..d18dd9b8a 100644
--- a/src/rules.cpp
+++ b/src/rules.cpp
@@ -211,6 +211,13 @@ static void colorizeKeyword (Task& task, const std::string& rule, const Color& b
   }
 }
 
+////////////////////////////////////////////////////////////////////////////////
+static void colorizeUDA (Task& task, const std::string& rule, const Color& base, Color& c)
+{
+  if (task.has (rule.substr (10)))
+    c.blend (base);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 static void colorizeDue (Task& task, const Color& base, Color& c)
 {
@@ -313,6 +320,7 @@ void autoColorize (Task& task, Color& c)
       else if (r->substr (0, 10) == "color.tag.")     colorizeTag          (task, *r, base, c);
       else if (r->substr (0, 14) == "color.project.") colorizeProject      (task, *r, base, c);
       else if (r->substr (0, 14) == "color.keyword.") colorizeKeyword      (task, *r, base, c);
+      else if (r->substr (0, 10) == "color.uda.")     colorizeUDA          (task, *r, base, c);
     }
   }
 }
diff --git a/test/color.uda.t b/test/color.uda.t
new file mode 100755
index 000000000..297635aba
--- /dev/null
+++ b/test/color.uda.t
@@ -0,0 +1,62 @@
+#! /usr/bin/env perl
+################################################################################
+## taskwarrior - a command line task list manager.
+##
+## Copyright 2006-2012, Paul Beckingham, Federico Hernandez.
+##
+## Permission is hereby granted, free of charge, to any person obtaining a copy
+## of this software and associated documentation files (the "Software"), to deal
+## in the Software without restriction, including without limitation the rights
+## to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+## copies of the Software, and to permit persons to whom the Software is
+## furnished to do so, subject to the following conditions:
+##
+## The above copyright notice and this permission notice shall be included
+## in all copies or substantial portions of the Software.
+##
+## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+## OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+## THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+## LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+## OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+## SOFTWARE.
+##
+## http://www.opensource.org/licenses/mit-license.php
+##
+################################################################################
+
+use strict;
+use warnings;
+use Test::More tests => 4;
+
+# Create the rc file.
+if (open my $fh, '>', 'color.rc')
+{
+  print $fh "data.location=.\n",
+            "color.uda.x=red\n",
+            "uda.x.type=numeric\n",
+            "uda.x.label=X\n",
+            "_forcecolor=1\n";
+  close $fh;
+  ok (-r 'color.rc', 'Created color.rc');
+}
+
+qx{../src/task rc:color.rc add one 2>&1};
+qx{../src/task rc:color.rc add two x:3 2>&1};
+my $output = qx{../src/task rc:color.rc list 2>&1};
+
+unlike ($output, qr/ \033\[32m .* one .* \033\[0m /x, 'No color.uda');
+like   ($output, qr/ \033\[31m .* two .* \033\[0m /x, 'Found color.uda');
+
+# Cleanup.
+unlink qw(pending.data completed.data undo.data backlog.data synch.key color.rc);
+ok (! -r 'pending.data'   &&
+    ! -r 'completed.data' &&
+    ! -r 'undo.data'      &&
+    ! -r 'backlog.data'   &&
+    ! -r 'synch.key'      &&
+    ! -r 'color.rc', 'Cleanup');
+
+exit 0;
+