Blue Light, Night Mode, and Color Temperature

Color temperature sets how warm (orange) or cool (blue) white looks on your screen.

The numbers

• 6500K (D65) — the neutral standard for content and color work.
• Below 6500K — warmer, more orange; easier on the eyes at night.
• Above 6500K — cooler, bluer; looks "brighter" but harsher.

Night modes

Features like Night Light (Windows), Night Shift (macOS/iOS), and f.lux warm the screen on a schedule to reduce blue light in the evening. They can ease eye strain and help some people sleep — but they shift colors, so turn them off for any color-critical editing.

Eye-strain basics that matter more

Color temperature is a small factor. Bigger wins:

• Match screen brightness to the room (test extremes with White and Black screens).
• Follow the 20-20-20 rule (every 20 min, look 20 ft away for 20 s).
• Reduce glare and increase text size.

Verify your white

Load a White Screen: it should look neutral, not blue or yellow, at your chosen setting.