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Redshift (software)
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<p>Redshift is an application that adjusts the <a href="/facts/Computer_display/NRaTDFHc">computer display</a>'s <a href="/facts/Color_temperature/g77MjsPM">color temperature</a> based upon the time of day. The program is <a href="/facts/Free_software/IaoVtJXn">free software</a> and is intended to reduce eye strain, as well as <a href="/facts/Insomnia/C1TnQTb2">insomnia</a> (see <a href="/facts/Sleep/0bSDElWc">Sleep § Circadian clock</a> and <a href="/facts/Phase_response_curve/hSkhlIQ8">Phase response curve § Light</a>). </p><p>Redshift transitions the computer display's color temperature evenly between <a href="/facts/Daylight/G4GSx61M">daytime</a> and <a href="/facts/Night/aeJtffky">night</a> temperatures to allow the user's eyes to slowly adapt. At night, the color temperature is low, typically 3000–4000 K and preferably matching the room's <a href="/facts/Lighting/Gk54r8xE">lighting</a> temperature. Typical color temperature during the daytime is 5500–6500 K. </p>