How to fix yellow or blue colour cast in product photos

Have you ever photographed a white shirt and found it looking yellow, or a cream box turning blue-grey? That is a colour cast. It happens because different lights have different colours, and your camera guesses wrong about which to correct for. The adjustment that fixes it is called white balance.

Why it happens

Indoor bulbs often give a warm, yellow tone, while shade and cloudy skies can lean cool and blue. Mixing sources, like a window and a ceiling bulb, creates uneven tones in the same photo. Your phone tries to compensate automatically, but with a plain, single-colour product or backdrop it can misjudge.

Prevent it while shooting

Prevention is easier than correction.

• Shoot in daylight near a window, and switch off room bulbs, so you are using only one kind of light.
• Keep the same spot and time of day, so results stay comparable, as suggested in photographing products on a phone.
• Avoid bright coloured walls or clothing near the product, which bounce their colour onto it.
• Include a neutral reference in the first shot of a session, such as a plain white sheet of paper or a grey card, placed in the same light as the product.

Correct it with a neutral reference

White balance editing tools have a temperature slider, which moves between blue and yellow, and a tint slider, which moves between green and magenta. Some apps also have an eyedropper that lets you tap something that should be neutral grey or white, and the app adjusts everything accordingly.

1. Open the photo that contains the neutral reference.
2. Use the eyedropper on the white paper or grey card, or nudge the temperature slider until the reference looks neutral.
3. Check the product, not just the reference. It should now look right in real life.
4. Apply the same setting to the other photos from that session, as in how to edit a batch of product photos the same way.

If you have no reference, adjust by eye while holding the real product next to your screen. Move the temperature a little at a time. Yellow cast means cool it down, blue cast means warm it up.

Know the limits

No photo is perfectly colour accurate. Screens differ in how they show colour, printed items change under different lights, and a phone camera interprets colours its own way. You can get close, but you cannot guarantee an exact match on every device. Tell buyers in your description if a colour can look different on screen, and describe it in words too, such as "deep maroon" instead of only "red".

This matters because colour surprise is a common reason for returns, as discussed in returns and RTO: what nobody tells you.

Be careful with whites

Pure white products and backdrops show cast the most. If your white backdrop looks cream or blue, correct it, then compare with a white sheet of paper in the room. Do not over-correct, because a slightly warm white can look natural, while a harsh clinical tone looks fake.

Keep it consistent

Once you find a lighting spot that gives true colour, keep using it. That consistency saves editing time and makes your whole catalogue look uniform, which supports the trust discussed in what a website says about a brand before anyone buys.