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Luminance masks: target highlights, midtones, or shadows

Restrict a color pin to highlights, midtones, or shadows so a bright color and a dark version of the same color can be graded separately.

A pin on the color wheel selects a color, but color alone can't separate a bright blue sky from a blue shadow — both sit on the same spot of the wheel. A lightness range adds the missing axis, narrowing a pin to a color only where it is bright, midtoned, or dark.

Scope a pin to a tonal band

  1. Drop a pin. In the Color tab, click the color you want to adjust in the photo.

  2. Open the pin menu. Right-click the pin. Under Lightness range, each zone row shows a small density ridge — the shape of where that pin's color falls across the tonal range — so you can check whether the color exists in a band before choosing it.

  3. Pick a zone. Choose Full range, Highlights, Midtones, or Shadows. Hover a zone to preview the catch, then click to commit.

  4. Verify with H. With the pin selected, hold H to see which pixels it affects — they show bright against a dimmed grayscale version of the photo.

When you hover a zone, the photo, the color cloud, and the Lightness strip under the wheel preview the catch together, so you can judge the selection before committing.

Sampling the greens in the shadowed trees and pushing them toward blue, then holding H to check exactly which pixels the pin reaches.

Isolate first, grade second

A common approach is to isolate a tonal band first, then grade. The Working range chips at the top-left of the wheel do that. Tap Highlights and the color cloud collapses to show only the colors that live in the highlights; a pin you drop there is scoped to that band from the start. Switch to Shadows, push a pin toward teal; switch back to Highlights, push another toward warm.

The Working range acts as a viewing lens and a stamp on new pins — it is not saved into your file — and it resets to Full range whenever you open a new photo.

Isolate first, grade second: scoping to the shadows and pushing them toward teal, then to the highlights to warm the sunlight toward a deeper orange — a cinematic teal-and-orange split.

One color, two tones

To grade two versions of the same color, scope one pin to Highlights, then use Duplicate pin and re-scope the copy to Shadows — same hue, two tonal bands, two independent moves.

When a preset zone isn't precise enough, hold Ctrl and drag a rectangle across the exact region on the photo. Tone Caliper fits a pin to those pixels' color, spread, and lightness band, and the pin menu marks the band as custom.

This is also how you keep an adjustment off a subject: scope your grade to a band the subject's tones are not in.

One color, two tones: duplicating a pin, then switching the copy's lightness range from Highlights to Shadows so the bright and dark versions of the color are graded separately.

Protect a color

Any pin can act as a shield. Select the pin, right-click, and turn on Protect colors. The colors that pin covers are then held steady while your other pins grade around them — so a warm grade can sweep the whole frame without dragging a face, a product color, or a patch of sky along with it. It works on any color, not just skin.

Try this with your own photo — Tone Caliper is a free trial on Windows and macOS.

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