1# NAME 2 3**sct** - screen temperature control 4 5# SYNOPSIS 6 7**sct** 8\[*temperature*] 9 10# DESCRIPTION 11 12This utility can be used to change the screen temperature. 13 14A valid 15*temperature* 16value is between 1000 and 10000. 17If the 18*temperature* 19argument is not provided or its value is invalid 20then the screen temperature is set to the default value of 6500. 21 22# EXAMPLES 23 24Campfire: 25 26 sct 4500 27 28Dust storm on Mars: 29 30 sct 2000 31 32Coffee-free all nighter: 33 34 sct 8000 35 36# DIAGNOSTICS 37 38**Failed to get screen resources** 39Usually those messages mean that 40**sct** 41cannot connect to the 42X(7) 43server. 44 45**Failed to open X display %s** 46See 47**Failed to get screen resources**. 48 49# SEE ALSO 50 51redshift(1), 52xrandr(1) 53 54The original blog post about 55**sct** 56by Ted Unangst: 57[https://www.tedunangst.com/flak/post/sct-set-color-temperature](https://www.tedunangst.com/flak/post/sct-set-color-temperature) 58 59# HISTORY 60 61The 62**sct** 63utility was written by 64Ted Unangst <[tedu@OpenBSD.org](mailto:tedu@OpenBSD.org)>. 65 66# AUTHORS 67 68This 69manual page was written by 70Mateusz Piotrowski <[0mp@FreeBSD.org](mailto:0mp@FreeBSD.org)>. 71