Screen Soft Light / Specimen / KELVIN SCALE #FDF6E3 · RGB 253 · 246 · 227

No. 001 · KELVIN SCALE

Color temperature chart — the Kelvin scale from candle to shade

  • 01 Full Kelvin reference
  • 02 Visual color examples
  • 03 Direct link to each tool

Color temperature is measured in degrees Kelvin (K) and describes the warmth or coolness of a light source. This chart maps the full practical Kelvin scale — from 1900K candle flame to 10000K shadow blue — and links each common color temperature to a free fullscreen tool you can use right now to see, match, or work in that exact light.

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§ 01

Warm light (1900K – 3500K)

Warm light contains more red-orange wavelengths and less blue. Candle flame sits at 1900K. Sunset and tungsten incandescent bulbs are 2700K. Halogen bulbs are 3000K. Golden hour photography light is 3200K. Warm white LED bulbs are usually 3000-3500K. Best uses: cozy ambient, evening reading, video relaxation, golden-hour portraits, sleep-friendly night lighting. Tools: warm white screen (~3000K), golden hour light (3200K), reading light (3000K), night light (2700K), relax light (warm orange).

§ 02

Neutral white is the everyday 'just white' zone — the color of office overhead panels, kitchen task lights and bathroom mirrors.

Neutral white (3500K – 5000K)

Neutral white is the everyday 'just white' zone — the color of office overhead panels, kitchen task lights and bathroom mirrors. 4000K is the most common neutral office white. 4200K is the meeting preset on this site, tuned for video-call skin tones. 4500-5000K trends slightly cooler and is good for makeup application before going outdoors. Best uses: video calls, makeup, reading, paperwork, general task light. Tools: 4000K neutral white, meeting preset (4200K), makeup light, selfie light.

§ 03

Daylight white (5000K – 6500K)

Daylight white is the standard for color-critical work. 5000K (D50) is the print and graphic-arts standard — used in print shops worldwide. 5500K is approximate noon sun. 6500K (D65) is the display calibration standard, used for monitor calibration and digital photography. Best uses: product photography, paint matching, fabric color, print proofing, art workstations, SAD light therapy. Tools: 5000K daylight (D50), 6500K daylight (D65), product light, streaming light.

§ 04

Cool daylight and shade (6500K – 10000K)

Above 6500K, light reads as crisp blue-white. 7500K is overcast daylight. 8000-10000K is the deep blue cast of shadow on a clear day. These cool temperatures are uncommon for indoor lighting but appear naturally in outdoor photography and shadow areas. Best uses: simulating outdoor shade for portraits, dramatic cool studio lighting, blue-hour mood photography. Tools: blue screen (deep cool), white screen at maximum brightness.

§ 05

How to read a Kelvin chart

Read left-to-right as warm-to-cool. Lower Kelvin numbers are warmer (more red-orange). Higher Kelvin numbers are cooler (more blue-white). The scale is named after the Kelvin temperature unit because it describes the color a 'black body' (a theoretical perfect emitter) would glow when heated to that temperature. A 2700K incandescent bulb glows the same color as iron heated to 2700K. This is why warm bulbs have low Kelvin numbers — physical heat starts orange-red before reaching white-hot.

§ 06

Why color temperature matters for screen lighting

Your screen's color temperature directly affects how subjects look on camera, how colors appear in photos, how your eyes feel after long sessions, and whether the light disrupts sleep. Matching screen color temperature to the surrounding room light avoids the 'mixed lighting' look in video — different Kelvin values mixing in one frame creates color casts that look unprofessional. For sleep, warmer (lower Kelvin) is better; for color work, the right Kelvin standard for your industry (D50 print or D65 display) is essential.

Procedure

Three moves to peak output

  1. 01

    Pick your Kelvin range

    Use the chart sections below to find the color temperature you need — warm (2700-3500K), neutral (3500-5000K) or cool daylight (5000-6500K+).

  2. 02

    Open the matching screen tool

    Each Kelvin range links to a dedicated fullscreen light tool you can launch in the browser, no download.

  3. 03

    Match physical lighting

    If you are matching a room bulb, check the bulb packaging for its Kelvin rating, then use the matching screen-light preset.

Inquiries

Questions worth asking

Q.01 What is color temperature measured in?
Color temperature is measured in degrees Kelvin (K). The Kelvin scale describes the visual warmth or coolness of a light source — lower values (1500-3500K) appear warm orange-yellow, mid values (3500-5000K) appear neutral white, and higher values (5500K+) appear cool blue-white. The reference is the color of light emitted by a heated black body at that temperature, which is why 'warm' candlelight is at a low Kelvin value and 'cool' overcast sky is at a high one.
Q.02 What is the Kelvin scale for light?
The practical Kelvin scale for everyday lighting runs from about 1900K (candle flame) to 10000K (deep blue shade). Common reference points: 2700K = warm incandescent bulb, 3000-3200K = warm white / golden hour, 4000K = neutral office white, 5000K = print daylight standard (D50), 6500K = display daylight standard (D65), 7500K = overcast sky, 10000K = deep shadow on a clear day.
Q.03 What Kelvin is best for video calls?
For video calls, 4000-4500K is the sweet spot — warm enough to keep skin tones flattering but cool enough to avoid the candle-lit look. The meeting preset on this site uses 4200K. Pure daylight (6500K) reads as clinical on camera; warm white (3000K) makes you look orange. Stay in the 4000K range unless your call is specifically about color accuracy.
Q.04 What is the difference between D50 and D65?
D50 (5000K) and D65 (6500K) are both 'daylight' standards but for different industries. D50 is the print and graphic arts standard — used when comparing a printed object to a screen. D65 is the display calibration standard — used when calibrating monitors or evaluating purely on-screen work. If you compare physical to digital, use D50. If you work entirely on-screen, use D65.
Q.05 Are higher Kelvin values brighter?
No — Kelvin measures color, not brightness. A 6500K bulb and a 3000K bulb can have the same brightness; they only differ in color tint. Brightness (luminous output) is measured separately in lumens. A common confusion: cool 6500K light feels 'brighter' subjectively because it activates the eye's blue-sensitive receptors more, but the actual photon output may be identical to a warmer bulb.
Q.06 What Kelvin is best for sleep?
Below 3000K is best for evening use — the warm amber light contains less blue, which signals your body to produce melatonin. The night and reading presets use 2700K and 3000K respectively. Avoid 5000K+ within 2-3 hours of bedtime if you are sensitive to blue-light sleep disruption.
Cross-reference

Try adjacent plates

Enough specimen notes.

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