White balance in RAW: fixing color casts the right way

White balance is the one decision RAW lets you remake completely after the shot. This guide explains what Temp and Tint actually do, how to judge them, and how to handle the tricky cases like mixed light and sunsets.

Light is never truly white. Candlelight is deep orange, a tungsten bulb is warm, midday sun is fairly neutral, and open shade under a blue sky is distinctly cool. Our eyes adapt so quickly that we rarely notice, but a camera records the color exactly as it arrives. White balance is the correction that makes a white shirt look white again, and getting it right is often the difference between a photo that feels natural and one that just feels "off".

Why RAW makes white balance painless

In a JPEG, the camera multiplies its white balance choice into the red, green and blue values before compressing the image. Changing it later means shifting already-processed 8-bit colors, which can clip channels and produce muddy tones. In a RAW file, white balance is stored as metadata alongside untouched sensor data. A RAW converter applies it during development, so choosing a different setting afterwards is mathematically equivalent to having chosen it in the camera. There is no quality penalty for changing your mind. (More on this in RAW vs JPEG.)

The two controls: Temp and Tint

Temp (blue to yellow/orange)

Color temperature is measured in kelvin (K). Lower kelvin values describe warmer, more orange light; higher values describe cooler, bluer light. These are approximate, but useful reference points:

The counter-intuitive part: to correct warm light you set a lower kelvin value in the camera, and the photo gets cooler. That's why many editors show the slider as a blue-to-yellow gradient instead of numbers. In RAWSnap, Temp is a relative slider from -100 to +100 starting at the camera's as-shot value: move it right to warm the image, left to cool it.

Tint (green to magenta)

Not all light sits on the neat blue-orange line. Fluorescent tubes, many cheap LEDs, and light bouncing off green foliage or walls add a green cast; some other sources lean magenta. Tint handles that second axis. Move it toward magenta to cancel green, toward green to cancel magenta. Small values usually suffice; a few points of Tint can make skin look healthy instead of sickly.

Seeing the difference

As-shot, auto, or presets in camera?

Auto white balance (AWB) is good in most daylight scenes. Its weakness is consistency: as you change framing, AWB may pick slightly different values, so a series of photos from the same room can shift in color from frame to frame. Some cameras also offer an AWB variant that keeps a little warmth under tungsten for atmosphere.

Fixed presets (Daylight, Shade, Cloudy, Tungsten, Fluorescent) give the same result every frame, which makes batch correction easy: fix one photo, apply the same adjustment to the rest.

Custom white balance, measured from a gray card or white object, is the most accurate in the moment, and studio and product photographers rely on it.

With RAW, any of these is acceptable because you can change it later. If you plan to process many files together, a fixed preset makes that easier than AWB.

A practical routine for correcting white balance

1. Find something that should be neutral. A white wall, gray pavement, a white shirt, the whites of the eyes, clouds. Ignore objects that are actually colored.
2. Fix Temp first. Move it until that neutral area looks neither blue nor orange. Go a bit too far each way to bracket the right point, then settle in the middle.
3. Then fix Tint. If the neutral still looks slightly green or pink, adjust Tint in small steps.
4. Look at skin. Faces are the most sensitive test. Slightly warm skin almost always reads as more pleasant than slightly cool skin.
5. Step away and come back. Your eyes adapt to a color cast on screen within seconds. Looking at something else for a moment helps you judge fresh.

Correct versus pleasing

A perfectly neutral white balance is not always the best one. A sunset corrected to neutral loses its glow. Candlelit dinners and golden-hour portraits are supposed to look warm. Snow scenes and blue-hour cityscapes often look better slightly cool. A useful rule: correct fully when the color of the light is a distraction (an orange office, a green-tinted gym), and correct only partially when the color of the light is the mood. Many photographers warm portraits a few points beyond neutral simply because it flatters skin.

White balance also interacts with presets. A look like Golden Hour or Warm Film adds warmth on top of your base white balance, so set a sensible neutral first, then apply the preset. See using presets.

Mixed lighting: the hard case

When a scene contains two light sources, for example a warm lamp indoors and cool daylight through a window, a single global white balance cannot make both neutral. Typical options:

• Prioritize the subject. Balance for the light falling on the face; let the background go warm or cool.
• Split the difference so neither area looks extreme. This often works for interiors.
• Embrace the contrast. Warm interior with cool blue windows is a classic, attractive look.
• Use local adjustments in a full editor (Lightroom, Capture One, darktable) to correct each area separately. Global tools like RAWSnap's sliders can't target regions.
• Convert to black and white when color is hopeless. See black and white from RAW.

Your screen is part of the equation

White balance decisions are only as good as the display you make them on. A few habits make a real difference:

• Turn off warm-screen modes such as Night Shift, Night Light or blue-light filters while editing. They tint everything orange and will push you to over-cool your photos.
• Avoid strong ambient color. Editing next to a warm lamp or a brightly colored wall subtly shifts your perception.
• Use a neutral interface. Dark gray or neutral backgrounds are easier to judge against than colorful ones.
• Check on a second device. If a photo looks right on both your laptop and your phone, it will look right to most viewers. A hardware calibrator is worth considering if you print or deliver work to clients.

Keeping a series consistent

When you share a set of photos from the same event, inconsistent color is more noticeable than slightly imperfect color. Correct one representative frame carefully, save those settings (in RAWSnap you can store them as your own preset), and apply the same correction to every frame shot under the same light. Then fine-tune only the outliers, such as photos taken near a window. (In RAWSnap, slider settings apply to all open files, so export an individually corrected outlier on its own.) This is faster than correcting each file from scratch and gives the set a coherent look.

Special situations

Stage and concert lighting

Colored stage lights are deliberate; you can't "correct" a magenta spotlight to white. Aim for skin that isn't grotesque, and accept the stage color. Saturated colored light also clips individual channels easily, so watch Highlights.

Underwater

Water absorbs red quickly with depth, so underwater images go blue-green. Large Temp and Tint corrections help near the surface, but at depth there may be little red information left to restore.

Night streets

Sodium and LED streetlights vary widely. A slightly warm neutral usually looks most natural; fully neutral night scenes can feel artificial.

FAQ

Does changing white balance on a RAW file reduce quality?

In a full RAW editor, no. White balance is applied during development, so any setting you choose is equivalent to choosing it in the camera. That is one of the biggest practical advantages of RAW. Simpler converters, including RAWSnap, adjust Temp and Tint after development, which is fine for moderate corrections but less precise for extreme ones.

Why do my indoor photos look orange?

Household lighting is much warmer than daylight. If the camera didn't fully correct it, move Temp toward blue until whites look neutral, keeping a little warmth if you like the cozy feel.

What does the Tint slider do?

Tint corrects green or magenta casts, which are common under fluorescent tubes, some LEDs and near green foliage. Temp handles the blue-orange axis; Tint handles the other.

Why does the white balance look different in different apps?

Each converter interprets the camera's white balance tag through its own color profile, so the starting point can differ slightly. Judge by neutral objects in the photo rather than by the numbers.

Should I set white balance in camera if I shoot RAW?

It isn't required, but a fixed preset makes the camera preview more accurate and keeps a series consistent, which saves time when you edit many files at once.