# redshift > Adjust the color temperature of your screen according to your surroundings. > More information: . - Turn on Redshift with 5700K temperature during day and 3600K at night: `redshift -t {{5700}}:{{3600}}` - Turn on Redshift with a manually-specified custom location: `redshift -l {{latitude}}:{{longitude}}` - Turn on Redshift with 70% screen brightness during day and 40% brightness at night: `redshift -b {{0.7}}:{{0.4}}` - Turn on Redshift with custom gamma levels (between 0 and 1): `redshift -g {{red}}:{{green}}:{{blue}}` - Turn on Redshift with a constant unchanging color temperature: `redshift -O {{temperature}}`