How to Edit a Black and White Photo Properly

Black and white looks like the easy edit. Tap Mono, the colour goes, and the photo is supposed to come back serious and timeless. What usually comes back is a flat grey picture less interesting than the colour version.

That is not bad luck. Colour is one of the two ways a photo separates one thing from another, and when you take it away, everything drifts towards the same middle grey unless brightness is doing the work instead.

Here is what actually makes a monochrome photo work, in the order to deal with it.

What you lose when the colour goes

A colour photo tells things apart by hue and by brightness at once. A red jumper against a green wall is unmistakable. Convert it and both may land on a similar grey, the edge softens, and the subject stops standing out.

So the first question is not which conversion to use. It is whether the photo would still read if everything were grey.

You can check before you commit: turn the preview to Mono and look at the shape rather than the detail. If you can see where the person ends and the room begins, it will convert well.

Fix the light before you touch the edit

Monochrome lives on the direction of light, not the amount.

Light arriving from the side gives a face a bright side and a shadow side, and that alone is separation. Light arriving straight on, from a ring light or a screen held in front of you, flattens the face. Flat light is forgiving in colour, because skin tone still shapes the picture, but in black and white it leaves a pale oval with features drawn on it.

The simplest change is to stand so a window sits at an angle to your face rather than in front of it, then turn your head slightly towards the light. You get a lit cheek, a shadowed cheek and a defined jaw. The studio lighting in Sweet Selfie does the same job with the screen when there is no useful window.

Contrast is three decisions, not one slider

Most contrast controls stretch both ends of the range at once, which is blunt. Separating the decisions helps.

First, the black point. Somewhere in the frame there should be a genuinely black area, even a small one: hair, a dark doorway. Without it the whole picture floats and looks foggy.

Second, the white point. Something should be at or near white: a shirt, a highlight on a cheekbone, the edge of a window. Two anchors at the ends give the eye a scale to read everything else against.

Third, the middle, which is where the mood sits. Pushing the mid tones down makes a heavier picture, lifting them makes an airy one. Set the ends first and this becomes a taste decision rather than a rescue attempt.

Muddy conversions usually come from replacing all three with one contrast slider, pushed further and further because it never fixes the missing black point.

Give the face and the background different greys

Even with the ends set properly, a subject can merge into what is behind it because both sit at a similar brightness.

The fixes are physical rather than digital. If your face is well lit, put a darker part of the room behind you. If you are standing in shade, use the brightest wall available. Stepping away from the wall helps too, because light falls off with distance, so the background goes darker relative to your face.

Dark hair against a dark wall is where this shows up most. Half a step sideways solves what an hour of editing cannot.

Grain, smoothing and skin texture

Colour noise looks like a fault; grey grain looks like film. That is why a photo shot in a dim room often converts better than it holds up in colour, and why stripping out every trace of noise is a mistake.

In colour, skin keeps its realism from small variations in tone. In black and white those variations are already reduced, so heavy smoothing leaves a plastic surface. Keep beauty adjustments lighter than you would for a colour shot.

Sepia, tints and the screen you are judging on

Sepia is monochrome with a warm tint added back. It takes the coldness out of pure grey, which suits portraits and older-feeling shots. Keep it mild: a strong tint reads as a filter, a slight one reads as paper.

Your screen affects that judgement. On an iPhone, True Tone and Night Shift shift the display's white balance, so a tint set at night can look stronger in daylight, and auto-brightness changes how deep the blacks appear. Exact behaviour varies by model and iOS version, so turn Night Shift off and raise the brightness before making a final call.

Quick answers

Should I shoot in black and white or convert afterwards?

Convert afterwards. A monochrome preview helps you see tone while framing, and in Apple's Camera app a capture filter can usually be removed later in Photos because the original is kept, though other apps often save only the filtered result. Converting later also keeps the colour information available while you decide how each colour becomes grey.

Why do my black and white photos look grey and muddy?

Almost always because nothing is truly black and nothing is close to white, so every tone sits in the middle. Set those two ends and the picture usually resolves itself. If it still looks flat, the light was frontal and the photo has no shadow side.

Does black and white hide bad lighting?

It hides bad colour, not bad light. Mixed lamps, an orange room and blotchy skin tone stop being problems, while poor light direction becomes more obvious, since brightness is the only tool left.

How should I export a monochrome photo?

Full resolution, in the ratio the destination uses, exported once from the edit rather than re-cropped from an earlier export, since each save adds compression.

Where to get it

Sweet Selfie: Camera & Editor has Mono and Sepia, one-tap studio lighting for the shadow side of the face, and export at square, 4:5, 9:16 and 16:9 with no watermark. You can find it on the App Store here: on the App Store

Get the light and the two ends of the range right, and the conversion mostly takes care of itself.