4000K Color Temperature – What Color Is 4000 Kelvin?
4000K = Neutral / cool white (kitchens, offices)
4000 kelvin light looks neutral / cool white (kitchens, offices), approximately RGB 255, 206, 166 (#FFCEA6).
Step by step
- Find the color of a black-body radiator at that temperature.
- Approximate it in RGB: 255, 206, 166.
- Compare with common bulb ratings (2700K warm white, 4000K neutral, 5000K daylight).
4000K light is a balanced choice for kitchens, bathrooms, offices and garages where you need clear visibility without a harsh blue tint.
Details
- Description
- Neutral / cool white (kitchens, offices)
- Approximate RGB
- 255, 206, 166
- Hex
- #FFCEA6
- Mired
- 250
- Warmer or cooler than 4000K
- Neutral reference
How it works
Light bulb color temperature, measured in kelvin, compares a light’s color with that of an ideal glowing object heated to that temperature. Lower numbers look warm and orange, like candlelight and old incandescent bulbs; higher numbers look cool and bluish, like daylight. The kelvin rating describes color only — brightness is measured in lumens.
Nearby values
Related conversions
Frequently asked questions
What color is 4000K?
Neutral / cool white (kitchens, offices).
Is 4000K warm or cool light?
Neutral.
Where should I use 4000K bulbs?
Kitchens, bathrooms and offices.
Does color temperature affect brightness?
No — brightness is measured in lumens; kelvin describes only the color.