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Color Temperature Calculator

Convert color temperature (Kelvin) to RGB values, compare light source colors, and find the right white balance for photography, lighting, and displays.

Color Temperature

5500K

Hex

#ffedde

Mired

182

CIE x,y

0.334, 0.344

1000K Warm5500K Daylight20000K Cool

5500K

#ffedde

RGB

255, 237, 222

Hex

#ffedde

CIE xy

0.3345, 0.3439

Mired

182

Description

Daylight balanced. Standard for photography and video.

Camera White Balance

Daylight balanced (no shift needed)

Example Calculations

1Warm White Incandescent

Inputs

Color Temperature2700K (warm white)

Result

RGB Valuergb(255, 169, 87)
Hex Code#FFA957
Mired370
Common SourceIncandescent bulb / warm LED

2700K is the classic warm white of incandescent bulbs. The RGB value shows strong red and moderate green with minimal blue, creating the warm amber glow associated with cozy home lighting.

2D65 Standard Daylight

Inputs

Color Temperature6500K (D65 daylight)

Result

RGB Valuergb(255, 249, 253)
Hex Code#FFF9FD
Mired154
Common SourceOvercast sky / monitor D65 standard

6500K (D65) is the standard reference white for monitors and print proofing. It appears nearly pure white with a very slight blue tint, matching average north-facing daylight.

3Blue Sky / Deep Shade

Inputs

Color Temperature10000K (blue sky)

Result

RGB Valuergb(201, 218, 255)
Hex Code#C9DAFF
Mired100
Common SourceClear blue sky / deep shade

10000K represents the very blue light of a clear sky or deep shade. Photos taken in shade without white balance correction will have a strong blue cast at this color temperature.

Frequently Asked Questions

Q

What is color temperature and how is it measured in Kelvin?

Color temperature describes the hue of a light source on the Kelvin (K) scale. Lower values (2700–3000K) produce warm, yellowish light like incandescent bulbs. Higher values (5000–6500K) produce cool, bluish-white light like daylight. The scale is based on the color a theoretical black body radiator emits when heated to that temperature.

  • 1800–2200K: candlelight, very warm amber
  • 2700–3000K: warm white (incandescent, soft LED)
  • 3500–4000K: neutral white (office lighting)
  • 5000–5500K: daylight (noon sun, daylight LED)
  • 6500–7500K: cool daylight (overcast sky, blue tint)
Q

How do you convert Kelvin to RGB values?

Kelvin to RGB conversion uses polynomial approximation algorithms since the relationship is not a simple formula. For temperatures between 1000K and 40000K, the Tanner Helland or Neil Bartlett algorithms provide accurate results. The red channel peaks at low temperatures, green is mid-range, and blue dominates at high temperatures.

  • Below 6600K: red = 255, green and blue calculated from temp
  • Above 6600K: blue = 255, red and green decrease with temperature
  • At 6500K (D65): approximately RGB(255, 249, 253) — near-white
  • Algorithms by Tanner Helland and Neil Bartlett are most widely used
  • Results are approximate — real light spectra are more complex than RGB
Q

What Kelvin white balance setting should I use for photography?

Set your camera’s manual Kelvin white balance to match the ambient light: 3200K for tungsten/indoor, 5200–5500K for daylight/flash, 6000–6500K for cloudy/shade. Shooting in RAW lets you adjust white balance in post-processing without quality loss.

  • Tungsten/incandescent: 2800–3200K
  • Fluorescent: 3800–4500K
  • Daylight/flash: 5200–5500K
  • Cloudy: 6000–6500K
  • Shade: 7000–8000K
Q

What is the best color temperature for LED home lighting?

Most people prefer 2700–3000K (warm white) for living rooms and bedrooms, 3500–4000K (neutral white) for kitchens and bathrooms, and 5000K (daylight) for workshops and reading areas. Mixing color temperatures in the same room creates a jarring, unpleasant effect.

  • Living room/bedroom: 2700K (cozy, relaxing)
  • Kitchen/bathroom: 3500–4000K (clean, functional)
  • Home office: 4000–5000K (alert, productive)
  • Workshop/garage: 5000–6500K (maximum visibility)
  • Dimmable LEDs often shift warmer when dimmed (2200–2700K)
Q

What is the difference between CRI and color temperature?

Color temperature describes the hue of the light itself (warm vs cool), while CRI (Color Rendering Index) measures how accurately the light reveals the true colors of objects. A light can be 3000K with CRI 65 (poor) or CRI 95 (excellent) — same color but vastly different rendering.

  • CRI 80+: minimum for residential lighting
  • CRI 90+: recommended for kitchens, bathrooms, art galleries
  • CRI 95+: professional photography, medical, retail
  • High-CRI LEDs cost 10–20% more but show colors accurately

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Last Updated: Mar 16, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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