Why your resale photos make cream look yellow

Ask any reseller with a few hundred sales behind them what causes most of their returns and you will not hear "sizing". You will hear colour. The jacket that photographed olive and arrived brown. The dress described as cream that turned up looking custard. The buyer is not being difficult and you were not being dishonest — your camera and your ceiling light conspired against both of you.

This is worth understanding properly, because it is the one photography problem in resale that costs real money on every single listing, and it is almost entirely fixable without buying anything.

What colour temperature actually means

Light has a colour, even when it looks white to you. It is measured in kelvin, and the scale runs from warm to cool in a way that feels backwards: low numbers are orange, high numbers are blue.

• A standard warm household bulb sits around 2700K. Deeply orange.
• A "cool white" or "daylight" LED sits between 4000K and 5000K.
• Overcast daylight through a window is roughly 6500K, and quite blue.

Your eyes correct for this automatically and continuously. Walk from your kitchen into the garden and the white shirt on the line looks white in both places, despite the light being wildly different. Your brain is doing enormous work to make that true.

Your phone attempts the same trick and is much worse at it. It guesses, using an algorithm called auto white balance, and it guesses badly when the frame is dominated by one colour — which is exactly what happens when you fill the frame with a single garment.

Why a garment makes it worse

Auto white balance assumes the average of a scene should be neutral grey. That assumption holds up for a photograph of a room. It collapses for a photograph of one large cream jumper.

The phone sees a frame that is overwhelmingly warm and light, decides the scene must be lit by something orange, and compensates by pulling everything toward blue. Or it decides the jumper is the neutral and leaves the orange cast in place. Either way, the colour you get is a guess about a scene that breaks the rule the guess is based on.

This is why the same jumper photographs differently on your bed and on your kitchen table. Nothing about the jumper changed. The algorithm made a different guess.

Mixed light is the real villain

Here is the situation almost every reseller photographs in, usually without noticing: a room with a window on one side and a ceiling light on. That is 6500K coming from the left and 2700K coming from above.

There is no white balance setting that fixes this, because there is no single correct answer. One side of the garment is genuinely blue and the other is genuinely orange. Whichever the phone corrects for, the other gets worse. You end up with a jumper that is cream on one sleeve and yellow on the other, and no amount of editing will separate them cleanly.

Mixed light is the single most damaging habit in resale photography, and the fix is free: turn the ceiling light off.

Three changes that fix most of it

One: use one light source only. Turn off every bulb in the room and shoot near a window during the day. Or shoot at night with the window covered and one lamp. Not both. Consistency matters more than quality here — a slightly warm photograph is fine, a half-warm half-cool photograph is not.

Two: get a fixed white balance if your camera app allows it. Most phone cameras have a professional or manual mode with a white balance setting. Set it to match your light — around 5500 for daylight, around 3000 for a warm bulb — and leave it there. Every photo you take in that spot will now be consistent, which matters enormously when a buyer compares two items in your shop.

Three: put something known-white in frame. A sheet of printer paper at the edge of the shot gives you a reference. If the paper looks yellow in the photo, so does everything else, and you know to correct it. Crop the paper out afterwards.

Photograph in daylight, describe in daylight

One last habit worth adopting: assess the colour of an item in daylight before you write the description, not under the lamp you are photographing under. Sellers routinely describe a garment as the colour it appears in their flat at nine in the evening, then photograph it under a different light again, and the buyer receives a third colour.

Take the item to a window, look at it, and write down what you see. That description is the one that has to match the parcel.

Where restaging fits

Relighting a photograph after the fact can neutralise a moderate cast and put the garment on a clean, consistent surface, which removes most of what makes resale photography look like resale photography. It works from what your camera recorded, so a photograph with a mild warm cast comes back neutral.

What it cannot do is separate two different colours of light falling on the same garment, because that information is genuinely lost at the moment of capture. Turning the ceiling light off is still the highest-value thing you will do today.