Click Start Color Test to analyse your webcam's colour balance in real time. The tool samples your live camera feed to measure red, green, and blue channel levels, detect colour casts, and check for white balance issues. Get a quick read on whether your camera is reproducing accurate colours or showing a warm, cool, or tinted bias. Use the webcam viewer for full device specifications. The free webcam fps checker measures actual FPS delivered to the browser — not the rated spec.
Colour Channels
Values show each channel as a percentage of its maximum (0–100). Balanced channels indicate neutral white balance.
White Balance Guide
Fix Colour Issues
The webcam color test analyses colour channel balance from your live camera feed in real time. It takes no photos and stores no data — all processing is local to your browser tab.
Allow camera access when prompted. The live feed appears and colour analysis begins at 500ms intervals automatically.
Three bars show the relative strength of Red, Green, and Blue. Balanced bars indicate neutral colour. One dominant bar points to a colour cast.
The assessment card shows whether your camera's colour output is Neutral, Warm, Cool, or has a Green cast — with a brief note on the cause.
The swatch shows the average colour of the entire frame at a glance. Under neutral white light, this swatch should appear close to a neutral grey or match the colours in the scene.
White balance is the process of adjusting a camera's colour output so that white objects appear truly white under different light sources. When white balance is off, the entire image takes on a colour tint — called a colour cast — that affects how accurately your face, clothing, and background are reproduced. The free webcam brightness test shows a live brightness histogram and gives specific lighting improvement tips.
A warm cast gives your image an orange or yellow tint. This is caused by light sources with a low colour temperature — tungsten bulbs (2700K), candles, or warm-toned LED strips. On video calls, a warm cast makes skin tones look orange and can make white shirts appear cream or yellow. To fix it, switch to a daylight-temperature bulb (5000–6500K) or manually set the camera's white balance to "Daylight" or "Cloudy."
A cool cast gives the image a blue or cold tint. This typically occurs under overcast daylight, shade, or high-colour-temperature LEDs (above 6500K). Blue casts make skin tones look pale or ashen and can make the background appear hazy. Setting the camera's white balance to "Incandescent" or "Tungsten" will add warmth to counteract the blue, or adding a warm-tinted light source in front of you achieves the same result.
A green cast is the signature of fluorescent tube lighting, which has an irregular spectral output that spikes strongly in the green channel. Offices lit by fluorescent overhead lights commonly produce this effect. Green casts make skin tones look sickly and are difficult to correct with camera white balance controls alone. Replacing fluorescent lights with LEDs at 5000K or adding a complementary magenta gel over the light source are the most effective fixes.
When all three channels (R, G, B) are within approximately 10 points of each other, the camera is producing a balanced output. This does not guarantee perfect colour accuracy — it means the overall colour temperature is close to neutral. Cameras with strong auto white balance (AWB) algorithms will continuously adjust the channels to maintain neutral balance regardless of the light source, which is why the readings may shift slightly as you move around or change scenes.
Most webcams include an Auto White Balance (AWB) system that continuously samples the image and adjusts the colour channels to keep white areas looking white. Understanding how AWB works helps you interpret the colour test readings correctly.
Most webcam AWB systems sample the image every few frames and make small corrections. This means the RGB channel readings in this tool may shift slightly over time even in stable lighting — that is the camera's AWB at work, not measurement error. If the readings are fluctuating large amounts (10+ points per second), the AWB is struggling with the current lighting — likely mixed or rapidly changing light sources.
Some cameras allow you to lock the white balance at a fixed setting via the camera's companion software or operating system settings. A locked white balance prevents the camera from continuously shifting the colour tones as your background changes — useful for content creators who want consistent colour between scenes. Run the color test after locking white balance to confirm the fixed setting is producing neutral output before recording.
Webcam colour accuracy refers to how faithfully your camera reproduces the colours in the real scene it is capturing. A camera with high colour accuracy will render skin tones naturally, reproduce white surfaces as white, and show clothing colours that match how they look in person. A camera with poor colour accuracy will introduce a cast — a systematic bias toward one colour — that alters the appearance of everything in the frame.
Consumer webcams vary widely in their colour accuracy, even at similar price points. The main factors that affect colour output are the sensor's spectral sensitivity (how the photodiodes respond to different wavelengths of light), the in-camera image processing pipeline (how the raw sensor data is converted to the final RGB image), and the auto white balance algorithm (how aggressively the camera corrects for ambient light colour temperature).
This webcam color test measures the average RGB channel values in your live feed and identifies whether your camera is producing a warm, cool, or green colour cast under your current lighting. It does not compare against a calibration target — for that level of accuracy, hardware colorimeters are used in professional camera settings. What it does provide is a clear, practical measurement of whether your camera's colour output is balanced enough for video calls, streaming, and content creation.
The single most influential factor in your webcam color output is the light source illuminating your scene. Every light source has a colour temperature — measured in Kelvin (K) — that describes whether the light appears warm, neutral, or cool. When your camera's white balance setting does not match the colour temperature of your light source, a colour cast appears. The webcam resolution test shows your supported resolutions with aspect ratios and pixel dimensions for each.
Standard incandescent and warm-white LED bulbs emit light at 2700–3000K — a very warm, amber tone. Under these bulbs, cameras with auto white balance will attempt to correct, but a residual warm cast often remains, particularly with lower-quality webcam AWB systems. The result is a slightly orange skin tone and cream-coloured whites. Using a daylight-balanced LED (5000–6500K) replaces this cast with neutral output.
Natural daylight is considered the reference standard for accurate colour rendering. Overcast sky light (around 6500K) is particularly neutral and provides excellent colour accuracy without any directional harshness. The challenge with daylight as a primary light source is variability — the colour temperature shifts throughout the day as the sun moves across the sky, making your webcam color test readings fluctuate between morning and afternoon.
Fluorescent tubes produce light with an irregular spectral distribution that spikes sharply in the green portion of the visible spectrum. Most webcam white balance algorithms are not well-calibrated for fluorescent sources, leaving a residual green cast that makes skin tones look pallid and white objects look greenish. Replacing overhead fluorescent tubes with LED panels (5000K) is the most effective fix — adding a magenta-tinted light source in front of you can compensate if tube replacement is not possible.
Mixed lighting — for example, a warm desk lamp on one side and cool window light on the other — creates areas of different colour temperature across the frame. The camera's AWB picks an average, which means neither source is fully corrected. One side of your face looks warm and orange, the other looks cool and blue. The fix is to use a single consistent light source, ideally at 5000–6500K, to eliminate the temperature mismatch.
If your webcam color test is showing unbalanced RGB channels, these are the most common causes and their solutions: