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Filtering blue light

asked 2014-07-21 09:44:04 -0500

william94 gravatar image

updated 2014-07-21 10:18:23 -0500

mether gravatar image

Hi I'm running fedora 20 on a laptop (no physical button to calibrate the screen) and I need to remove most of the blue light emitted by my screen day and night. I have chronic headache and I can't stay in front of a screen more than 45mn without being in pain.

I tried Redshift but it changes itself with daylight and I need to remove permanently the blue light.

What software should I use ? I already use the integrated calibration tool on win8.1 and a blue light filter on android but I didn't find anyting like that on fedora


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answered 2014-07-21 15:53:31 -0500

hedayat gravatar image

There should be many ways, but I can name two of them

  1. Using redshift: redshift takes many options which controls its behavior. For example, you can set the temperature for day and night to the same value using -t 4000:4000. Also, it takes -o which, according to its man page is: -o One shot mode (do not continuously adjust color temperature). I highly suggest you to inspect man redshift and use the best options which suit you.
  2. Fedora (at least in Gnome) supports "Color Profiles". You can find its setting window at Settings->Colors. It lets you select one of several predefined color profiles. One of the test profiles is the Blue profile which actually makes most things look blue. However, it should be possible to create a color profile which removes Blue light instead, but this screen doesn't let you define color profiles. You should define your profile in an ICC file which can be importer here.
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Asked: 2014-07-21 09:44:04 -0500

Seen: 1,933 times

Last updated: Jul 21 '14