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Screen color calibration

asked 2014-10-10 07:27:59 -0500

Mehran gravatar image

updated 2014-10-18 22:06:18 -0500

Colors on my monitor are bluish when I'm using fedora 20. However my screen color is perfect when i'm using windows 8.1. I tried to adjust it by means of gnome color manager. I tried windows icc profiles, but they made colors reddish. I think I need another way to adjust it or a tool to make icc profile on my own. I'd be grateful if someone introduces a method that I can modify my screen color with.

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What is your question ? state properly.

SDas gravatar imageSDas ( 2014-10-11 05:49:30 -0500 )edit

@SDas : I restated it.

Mehran gravatar imageMehran ( 2014-10-11 09:14:49 -0500 )edit

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answered 2014-10-12 02:52:59 -0500

davidva gravatar image

updated 2014-10-12 03:06:21 -0500

Very simple, you can use "brightness" a graphic application where you can change, the brightness and color profiles using xrandr.

image description

How to install Manually

su -c  'dnf -y install git wxPython python-pyside wxGTK xrandr python gettext'

git clone

cd $HOME/Brightness/src/

sed -i 's;#!/usr/bin/python;#!/usr/bin/python2;'


Alternative you can install Brightness from this thirdparty project.

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I prefer the first method. Could you explain what does the two last lines exactly do?

Mehran gravatar imageMehran ( 2014-10-12 12:57:31 -0500 )edit

Migrate the program to python 2, and execute the program written in python. About "sed"

The problem with this method is that you can not save the settings, so when you restart o change/close session, You need run the program again.

cd $HOME/Brightness/src/
davidva gravatar imagedavidva ( 2014-10-12 23:37:48 -0500 )edit

Thank you, but i prefer not use thirdparty repos.

Mehran gravatar imageMehran ( 2014-10-16 18:06:08 -0500 )edit

answered 2014-10-16 18:01:39 -0500

Mehran gravatar image

Finally I managed to calibrate my monitor. I'm wondering no one didn't even mention xgamma command! Here is what I did:

I typed


in the terminal and the output was

Red 1.000, Green 1.000, Blue 1.000

so I reduced the blue gamma to .9 by the following command

xgamma -bgamma 0.900

and my screen wasn't bluish anymore. Now the problem is that every time I restart the laptop all settings reset. Any idea about saving xgamma settings?

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Add the line xgamma -bgamma 0.900 line to your ~/.xinitrc file (create the file if it doesn't exist)

thinkmassive gravatar imagethinkmassive ( 2018-08-08 12:40:31 -0500 )edit

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Asked: 2014-10-10 07:27:59 -0500

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Last updated: Oct 18 '14