diff --git a/python/plugins/processing/algs/grass7/description/r.colors.stddev.txt b/python/plugins/processing/algs/grass7/description/r.colors.stddev.txt
new file mode 100644
index 00000000000..bf422af21b9
--- /dev/null
+++ b/python/plugins/processing/algs/grass7/description/r.colors.stddev.txt
@@ -0,0 +1,7 @@
+r.colors.stddev
+Sets color rules based on stddev from a raster map's mean value.
+Raster (r.*)
+ParameterRaster|map|Name of raster map|False
+*ParameterBoolean|-b|Color using standard deviation bands|False
+*ParameterBoolean|-z|Force center at zero|False
+OutputRaster|output|Stddev Colors
diff --git a/python/plugins/processing/algs/grass7/ext/r_colors_stddev.py b/python/plugins/processing/algs/grass7/ext/r_colors_stddev.py
new file mode 100644
index 00000000000..d0bde2b324d
--- /dev/null
+++ b/python/plugins/processing/algs/grass7/ext/r_colors_stddev.py
@@ -0,0 +1,80 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    r_colors_stddev.py
+    ------------------
+    Date                 : February 2016
+    Copyright            : (C) 2016 by Médéric Ribreux
+    Email                : medspx at medspx dot fr
+***************************************************************************
+*                                                                         *
+*   This program is free software; you can redistribute it and/or modify  *
+*   it under the terms of the GNU General Public License as published by  *
+*   the Free Software Foundation; either version 2 of the License, or     *
+*   (at your option) any later version.                                   *
+*                                                                         *
+***************************************************************************
+"""
+
+__author__ = 'Médéric Ribreux'
+__date__ = 'February 2016'
+__copyright__ = '(C) 2016, Médéric Ribreux'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = '$Format:%H$'
+
+
+def processInputs(alg):
+    # We need to import all the bands and to preserve color table
+    raster = alg.getParameterValue('map')
+    if raster in alg.exportedLayers.keys():
+        return
+
+    alg.setSessionProjectionFromLayer(raster, alg.commands)
+    destFilename = alg.getTempFilename()
+    alg.exportedLayers[raster] = destFilename
+    command = 'r.in.gdal input={} output={} --overwrite -o'.format(raster, destFilename)
+    alg.commands.append(command)
+
+    alg.setSessionProjectionFromProject(alg.commands)
+
+    region = unicode(alg.getParameterValue(alg.GRASS_REGION_EXTENT_PARAMETER))
+    regionCoords = region.split(',')
+    command = 'g.region'
+    command += ' -a'
+    command += ' n=' + unicode(regionCoords[3])
+    command += ' s=' + unicode(regionCoords[2])
+    command += ' e=' + unicode(regionCoords[1])
+    command += ' w=' + unicode(regionCoords[0])
+    cellsize = alg.getParameterValue(alg.GRASS_REGION_CELLSIZE_PARAMETER)
+    if cellsize:
+        command += ' res=' + unicode(cellsize)
+    else:
+        command += ' res=' + unicode(alg.getDefaultCellsize())
+    alignToResolution = alg.getParameterValue(alg.GRASS_REGION_ALIGN_TO_RESOLUTION)
+    if alignToResolution:
+        command += ' -a'
+    alg.commands.append(command)
+
+
+def processCommand(alg):
+    # We need to remove output
+    output = alg.getOutputFromName('output')
+    alg.exportedLayers[output.value] = output.name + alg.uniqueSufix
+    alg.removeOutputFromName('output')
+    alg.processCommand()
+    alg.addOutput(output)
+
+
+def processOutputs(alg):
+    # We need to export the raster with all its bands and its color table
+    output = alg.getOutputValue('output')
+    raster = alg.getParameterFromName('map')
+
+    # Get the list of rasters matching the basename
+    command = "r.out.gdal -t input={} output=\"{}\" createopt=\"TFW=YES,COMPRESS=LZW\"".format(
+        alg.exportedLayers[raster.value], output)
+    alg.commands.append(command)
+    alg.outputCommands.append(command)
diff --git a/python/plugins/processing/algs/grass7/ext/r_what_color.py b/python/plugins/processing/algs/grass7/ext/r_what_color.py
index 96733fd5807..314809e0f5d 100644
--- a/python/plugins/processing/algs/grass7/ext/r_what_color.py
+++ b/python/plugins/processing/algs/grass7/ext/r_what_color.py
@@ -32,6 +32,7 @@ def processInputs(alg):
     if raster in alg.exportedLayers.keys():
         return
 
+    alg.setSessionProjectionFromLayer(raster, alg.commands)
     destFilename = alg.getTempFilename()
     alg.exportedLayers[raster] = destFilename
     command = 'r.in.gdal input={} output={} --overwrite -o'.format(raster, destFilename)