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Questions related to colour management of the machines display, etc.

146 questions

0votes0answers14views

Setting the display gamma curve with nouveau driver

The colours on my monitor are washed out, from being too bright. Previously, I was running nvidia proprietary drivers, and I could adjust that with the xgamma tool. After switching to Nouveau, I can ... user avatar Bram

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0votes0answers18views

Lubuntu 20.04 video streaming: colours too pale

Live streams of tv stations are paler than the actual tv programme. This seems to hold true for streaming in browsers (Firefox and Google Chrome) as well as VLC streams. I have Lubuntu 20.04 (lxqt ... user avatar bpn

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0votes1answer48views

How can I change directory text color in C shell?

I want to change directory color in cshell. So I copied /etc/DIR_COLORS file to my ~$home and named .dir_colors. I modified that file but it doesnt change the text color. If I source that file then ... user avatar Cho

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0votes0answers17views

Scanner calibration on Ubuntu 21.10

I've followed the instructions here, but when I click Calibrate... nothing happens. Any thoughts on what I am doing wrong? Ubuntu 21.10 Canon LiDE 400 scanner user avatar KneadToKnow

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2votes1answer35views

printf statement with background and foreground colours

I know that a background colour code is \033[41m, whereas a foreground colour code is \033[32m. I am interested in making a code for changing the background and foreground in a console terminal ... user avatar Hovlar

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3votes2answers94views

Colour filters other than red (maybe a cheap alternative to precision tinted lenses)

Is this possible? Is there software to have a magenta or turquoise color filter, for example? ( It's an accessibility issue, relevant to irlen syndrome: I see extra shapes around letters and certain ... user avatar Rabbit

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2votes0answers16views

How might single windows be made negative for the purposes of accessibility?

Previously I was able to set single windows to turn to negative colours using CompizConfig Settings Manager. One could enable an accessibility plugin called "Negative" to switch the window ... user avatar BlandCorporation

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0votes0answers41views

Set gamma correction curve (not only the exponent of a power law)

xgamma and kgamma allows one to alter the gamma correction curve by changing the exponent of a power-law expression original image: Some programs and video cards allows one to alter this curve with ... user avatar toliveira

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1vote1answer568views

Color Calibration error on Ubuntu 21.10

I just updated to Ubuntu 21.10 and I am facing a problem with my monitor color calibration profiles. I generated ICC profiles for my monitor and could use them with the default "System settings --... user avatar Matthias L

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0votes0answers168views

Color management fail on Ubuntu 21.10

After upgrade to 21.10, color management seems disabled throughout the system. On a wide-gamut monitor, the colors look garish. It's as if the OS's color daemon doesn't load my monitor profile, even ... user avatar George

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0votes1answer178views

Adobe RGB Monitor behaves like sRGB under Xorg & HW Acceleration

Having a monitor that supports 100% of Adobe RGB color space. Used it for a while with Xorg and NVIDIA GPU after I found out that effective color gamut used was sRGB. I have noticed that with disabled ... user avatar Alex S.

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Apple TrueTone alternative?

Are there any alternatives to Apple’s TrueTone that works without a TrueTone sensor? (e.g. the ability to adjust the warmth of the display based on the color temperature of a room measured by a camera ... user avatar Thunder_Ruler

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2votes0answers67views

Is there a way to shift the screen color hues with colors inverted?

I've managed to invert the screen with xcalib -alter -invert, but now blue is orange etc. Isn't there a way to hue-shift the screen colors as well, so only the brightness is inverted and not the hue? (... user avatar Gavin Haynes

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1vote0answers170views

Colors on the screen is washed

I tried xgamma, xrandr everything, none works. This is how my screen looks now, the colors are dull. Now for vlc I can change color settings for the video, to get an output like this. Please note ... user avatar ASWIN VENU

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1vote0answers33views

Screen lock disables color correction profile

I calibrated my monitor using a colorimeter and the color tab in Gnome settings. The color on the screen looks good until the screen turns off (automatically after some time). When the screen starts ... user avatar Benjamin

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