Color Temperature Test
Compare browser-rendered warm, neutral, and cool white references under steady viewing conditions.
This check opens a focused test surface. You can return with Escape. Review what this browser test can and cannot measure.
Before you start
- Disable temporary night-light or blue-light filters.
- Use neutral room lighting and keep the display preset unchanged.
How to run this check
- Start the Color Temperature Test
- View the labeled warm, neutral, and cool reference samples
- Keep room lighting and display settings steady while comparing them
- Record which sample appears most neutral from your normal viewing position
- Use a calibrated colorimeter when an exact white point is required
What this browser test can tell you
Can help you check
- Relative warm, neutral, and cool comparison.
Cannot measure
- This test cannot measure a physical Kelvin value or calibrated white point.
Setup, interpretation, and sources
Recommended setup
- Disable temporary night-light filters and use steady neutral room lighting.
- View the samples straight on after the display has warmed up.
How to interpret what you see
- Record which sample looks most neutral and whether the result changes with display presets.
- Exact white-point and correlated color-temperature measurements require a calibrated colorimeter or spectroradiometer.
Sources
Methodology reviewed:
💡 Why This Test?
Color temperature is a measured description of how warm or cool a white appears. The Kelvin labels on this page name illustrative browser colors; they are not measurements of your display.
Use the samples for relative visual comparison under steady lighting. Exact correlated color temperature and white point require a calibrated colorimeter or spectroradiometer.
✅ What You'll Check:
- Whether whites appear truly neutral or have color tints
- Relative differences between labeled warm and cool samples
- Which browser-rendered sample appears most neutral to you
- Whether the visual selection changes across display presets
- Your viewing conditions and selected reference
📖 How to Use This Test
- Disable temporary night-light filters and start the fullscreen comparison
- View in a room with neutral lighting (not direct sunlight)
- Navigate through different color temperatures using arrow keys
- Find which temperature looks most "neutral white" to you
- Treat every Kelvin label as an illustrative reference, not a reading
- Note if your monitor leans warm (yellow) or cool (blue)
- Select your preferred temperature in the results
Tip: Keep room lighting, viewing position, and display settings steady. Record the closest-looking sample before making any adjustment.
Click to start fullscreen color temperature testing. Use arrow keys to navigate.
🌡️ Color Temperature Scale
The Kelvin labels are illustrative browser references, not measured white points.
📊 Workflow Context
Different editing, video, print, and viewing workflows can specify different measured white-point targets.
The labels in this browser pattern are relative visual references and do not show which target the display currently meets.
For color-critical work, use the target defined by the workflow and verify it with calibrated measurement in controlled viewing conditions.
🔍 What to Look For
- ● Too Cool: Whites look bluish
- ● Too Warm: Whites look yellowish
- ● Most neutral: Your relative visual selection
- ● 6500K label: One illustrative reference
📋 How to Test
Start Fullscreen Test
Click the test button and allow fullscreen mode for a larger relative comparison.
Compare Temperatures
Navigate through different color temperatures using arrow keys. Pay attention to how "white" looks.
Look for Neutral White
Find which temperature looks most neutral (neither too blue nor too yellow).
Select Best Match
After testing, select the labeled sample that appeared most neutral under the current conditions.
⚠️ Common Issues
- ● Blue appearance: Record which sample and settings show it
- ● Yellow appearance: Record which sample and settings show it
- ● Pink/Magenta: RGB balance issue
- ● Neutral appearance: A subjective selection, not calibration proof
🔧 Common Issues & Solutions
❄️ "Whites look too blue/cold" (Cool color temperature >6500K)
What you observed: A browser-rendered white sample appeared cooler or bluer than expected.
Context: Room lighting, visual adaptation, temporary filters, ICC profiles, browser color management, and the display preset can all affect that relative appearance.
Next step: Record the selected sample and settings. Use calibrated measurement before changing individual RGB controls for color-critical work.
🌅 "Whites look yellow/orange like candlelight" (Warm temperature <5000K)
What you observed: A browser-rendered white sample appeared warmer or yellower than expected.
Context: Night-light features, adaptive display settings, ambient light, and the current display preset can change the appearance.
Next step: Disable temporary filters for a controlled comparison, keep the viewing environment steady, and record the settings with the observation.
👁️ "Can't tell difference between 6500K and 9300K" (Eyes adapted to wrong white point)
What you observed: Two labeled warm-to-cool samples did not appear clearly different.
Interpretation: Visual adaptation and room lighting make absolute white-point judgments unreliable. This page supports only relative comparison on the same screen.
Next step: Take a visual break, repeat under the same neutral room lighting, and use a calibrated meter when an actual Kelvin value is required.
🔆 "6500K at 100% brightness but 7000K at 50%" (White point shift)
What you observed: The most-neutral-looking labeled sample changed after the display brightness setting changed.
Context: Display processing, room adaptation, output transforms, and the brightness control can affect a visual selection. The page cannot identify the dimming method or quantify the shift.
Next step: Make comparisons at your normal brightness and record each run separately. Use calibrated measurement to quantify brightness-dependent white-point changes.
🌙 "Test shows orange/yellow but monitor set to 6500K" (Software color filter active)
What you observed: The browser sample appeared warmer than the value selected in the display menu.
Context: Operating-system night-light features, adaptive color, ICC profiles, browser color management, and display modes can all alter the rendered sample.
Next step: Record which filters were active, disable temporary filters only when appropriate, and repeat the comparison. Do not infer a measured white point from the label.