Photoshop · Lesson 47Blend Modes: The Darken Group
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Photoshop · Lesson 47
These Modes Only Darken. Never Lighten.
The Darken group contains four blend modes that share one defining rule: they can only darken the image, never lighten it. No pixel in the result can be brighter than the original. Learn all four, understand how they differ, and know when to reach for each.
Da
Darken — Takes whichever pixel is darker, channel by channel
A simple comparison: wherever the blend is darker than the base, the blend wins. Wherever the base is darker, the base stays. Clean, simple, no math beyond comparison.
Mu★
Multiply — Multiplies pixel values. White disappears. The workhorse.
Covered in depth in PS 42. The most useful mode in the group. Smooth, natural darkening across the full tonal range.
CB
Color Burn — Darkens by increasing contrast and saturation
More aggressive than Multiply. Saturated, contrasty shadow work. Stylized results. White on blend has no effect.
LB
Linear Burn — Adds values and subtracts 1. Deep, inky blacks.
The most aggressive darkening mode. Very deep shadows, clips to black quickly. Use carefully. White on blend has no effect.
Mode 1
Darken Mode
Darken is the simplest mode in the group. For each channel (R, G, B), it compares the base pixel value and the blend pixel value and keeps whichever is darker. No multiplication, no formula — just a comparison.
Rule
Result = min(Base, Blend) — per channel
For every channel independently: if the blend pixel is darker than the base, the blend wins. If the base is darker, the base stays. Pixels lighter than the blend layer are replaced. Pixels darker than the blend layer are preserved.
Use
Combining two exposures — keep only the darkest areas
Classic use case: you have two exposures of a scene where one has a darker, more dramatic sky and the other has a better-exposed foreground. Place the darker sky exposure on Darken — wherever it is darker than the base (the sky), it shows through. Wherever the base is darker (the foreground), the base is preserved.
Note
Comparison is per channel — can produce color shifts at edges
Because Darken compares R, G, and B channels independently, a pixel that is darker in one channel but lighter in another can produce unexpected mixed colors at edges. The result is generally clean for luminosity-based compositing but can shift color at transitions.
🧠Darken is ideal when you want to keep the darkest tones from two layers without any mathematical transformation. It's a pure selection — the darker pixel always wins.
Mode 2 — Review
Multiply — The Workhorse ★
Multiply was covered in depth in PS 42. This is a one-slide summary for reference within the Darken group context. For full detail, return to PS 42.
Math
Result = Base × Blend (values 0–1)
Multiplying two fractions always produces a smaller number — so Multiply always darkens. White (1.0) × anything = that value, so white disappears. Black (0) × anything = 0, so black stays black.
Key
White disappears — the foundation of texture overlays
Textures on white paper go straight to Multiply — the white vanishes, only the texture integrates into the image below. No masking needed for the white background.
The most versatile mode in the group. Smooth, natural-looking darkening across the full tonal range. Use Multiply 90% of the time when you need to darken.
⭐
Multiply is the Default Choice in the Darken Group
When you need to darken and aren't sure which mode to use, start with Multiply. It produces the most natural-looking results in the group and handles the widest range of use cases. Only switch to Color Burn or Linear Burn when you specifically want their more stylized character.
Mode 3
Color Burn
Color Burn darkens the base layer to reflect the blend layer by increasing contrast — producing results that are more aggressive, more saturated, and more dramatic than Multiply. White on the blend layer has no effect.
Math
Result = 1 − (1−Base) / Blend — increases contrast as it darkens
The formula darkens by increasing the contrast between the base and the result. Unlike Multiply which smoothly scales values down, Color Burn pushes contrast upward as it darkens — creating deeper shadows with more tonal separation.
Key
White on blend = no effect. Darkens AND saturates.
Pure white on the blend layer leaves the base unchanged. As Color Burn darkens, it also increases the saturation of the colors involved — shadows become deeper and richer in color simultaneously. This is what distinguishes it from Multiply.
Use
Stylized shadow work / high-saturation dramatic effects
Color Burn is the right choice when you want deep, richly saturated shadows with strong contrast — fashion photography, creative composite work, dramatic landscape effects. It clips to pure black faster than Multiply, so use lower opacity and watch highlights carefully.
⚠️
Clips to Black Quickly
Color Burn's aggressive formula clips shadow areas to pure black more readily than Multiply. At full opacity on dark images, you can lose significant shadow detail. Reduce opacity to 30–60% and check the histogram to ensure you're not crushing the shadows to pure black.
Mode 4
Linear Burn
Linear Burn adds pixel values together and subtracts 1. This produces a very deep, inky darkening — more aggressive than Multiply but with a different character than Color Burn. White on the blend layer has no effect.
Math
Result = Base + Blend − 1
Simply add both values and subtract 1. Any sum less than 1.0 produces a positive result; anything at or below 0 clips to pure black. The formula is linear (no contrast increase) but very aggressive — it darkens faster than Multiply.
Key
Deep, inky blacks. Clips to black very quickly.
Linear Burn produces the deepest, inkiest shadows in the group. It clips to pure black faster than any other mode — two 50% gray pixels (0.5 + 0.5 − 1 = 0) produce pure black. Use carefully and at low opacity.
Use
Heavy darkening / graphic and illustration effects / inky shadows
Linear Burn suits heavy, dramatic darkening effects — graphic design, illustration-style compositing, heavily stylized photography. Less common in naturalistic photography. Its linear, non-contrasty darkening feels different from both Multiply and Color Burn.
⚠️Linear Burn clips to pure black so aggressively that it's easy to lose all shadow detail. Always reduce opacity significantly (10–40%) and check the histogram when using Linear Burn on photographic images.
Mode 5
Darker Color
Darker Color is the least commonly used mode in the group. Unlike Darken (which compares channels independently), Darker Color compares the composite luminosity of each pixel as a whole and shows whichever complete pixel is darker.
Rule
Compares whole-pixel composite luminosity — not per channel
Darken mode compares each R, G, B channel independently. Darker Color computes the overall luminosity of the entire pixel (combining R+G+B into a single brightness value) and shows whichever whole pixel — base or blend — has the lower composite luminosity.
Effect
Selects entire pixels — can produce hue shifts at edges
Because it selects entire pixels (not individual channels), the winning pixel's color comes through completely. At edges where dark and light regions meet, this can produce unexpected color shifts or hard-edged hue transitions. Darken (per-channel) is usually cleaner.
Use
Specialty compositing — rarely used in practice
Darker Color is mostly a specialty tool for specific compositing tasks where you need pixel-level selection by overall luminosity rather than per-channel comparison. Most photographers will rarely need it.
💡
Darken vs. Darker Color — The Key Difference
Darken: compares R, G, B channels independently and takes the minimum of each. Can mix channels from base and blend in the same pixel. Darker Color: compares the whole pixel's luminosity and shows the entire winning pixel. No channel mixing — each pixel in the result belongs entirely to either the base or the blend layer. Different results, different edge behavior.
Comparison
The Darken Group Side by Side
Imagine the same neutral gray texture applied over an image with all four modes. Here is how each behaves.
🔍
Darken
Subtle and crisp. Only pixels darker than the blend replace the base. Light areas of the image are unchanged. Dark areas of the blend replace lighter areas of the base with hard transitions. Effect is limited and precise. Best for: exposure blending, keeping darkest regions of two layers.
⭐
Multiply
Smooth and natural. Proportional darkening across the full tonal range. White vanishes. Gradual, photographic darkening — no harsh transitions, no saturation shift. The most versatile result. Best for: textures, shadows, exposure correction, D&B. Default choice.
🔥
Color Burn
Saturated and contrasty. Shadows deepen AND become richer in color. High contrast in the darks. More dramatic than Multiply — a stylized, saturated look. Clips fast. Best for: stylized shadow effects, high-contrast fashion/creative work.
🖤
Linear Burn
Deep and inky. Very aggressive linear darkening. Shadows go very dark very fast. No saturation increase (unlike Color Burn) but clips to pure black quickly. Graphic, intense look. Best for: heavy darkening effects, graphic design, use at low opacity only.
Decision Guide
When to Use Each Darken Mode
Da
Darken — Blending two exposures, keeping the darkest areas
When you have two shots of the same scene and want a composite that keeps the darkest region from each — a dramatic sky from one, a well-exposed foreground from another — Darken mode delivers a clean, per-channel minimum selection.
The default for nearly everything in the darken group. When in doubt, start here. Natural-looking, smooth, white disappears, versatile. Use 90% of the time.
CB
Color Burn — Stylized, high-saturation shadow effects
When you want shadows to be both deep AND richly saturated — a stylized, high-contrast, dramatic look. Fashion, creative composites, bold landscape processing. Watch for clipping.
LB
Linear Burn — Heavy darkening, graphic looks, inky shadows
When you need extreme, inky darkening — graphic design work, heavily stylized effects, or illustration compositing. Use at low opacity on photographic images to avoid crushing shadow detail.
Advanced
Darken Group + Blend If
All four Darken group modes can be combined with Blend If sliders to automatically protect highlights from darkening — preventing over-darkening in the brightest areas of the image without manual masking.
1
Apply a Multiply texture layer — notice highlights get muddy
A texture on Multiply at full opacity often darkens highlights too much — the brightest areas of the image pick up the texture's darkening in a way that looks muddy or overworked.
2
Double-click the layer to open Layer Style → find Blend If
In the Blend If section, locate the "This Layer" gradient bar. The right white slider controls where the layer starts to fade out from the brightest pixels downward.
3
Drag the right white slider of "This Layer" inward to 200 or so
The texture begins to fade out of the highlights. Above value 200 in lightness, the Multiply darkening gradually disappears. Highlights regain their original brightness.
4
Alt/Option-click the slider to split it — smooth transition
Split the slider so the fade is gradual rather than a hard line. Drag the two halves so the fade spans roughly 150–255 — starting to reduce around 150 and fully transparent by 255.
💡Blend If is compatible with every blend mode. This combination — Darken group mode + Blend If highlight protection — is the professional way to apply darkening effects that respect the image's highlight range automatically.
Lesson 47 Complete
Challenge + Four Modes to Know.
1
Apply the same texture with all four Darken group modes
Place a texture over an image. Try Darken, Multiply, Color Burn, and Linear Burn in sequence. Note the increasing aggression — especially in the shadow areas. Compare at the same opacity.
2
Blend two exposures using Darken mode
Take two shots of the same scene at different exposures (or simulate with Levels adjustments on duplicates). Stack on Darken mode. Note how only the darker regions of the upper layer replace the base.
3
Apply a Multiply texture then use Blend If to protect highlights
Place a texture on Multiply. Use Blend If sliders (This Layer, right white slider, split) to fade the effect out above value 200. Compare before and after in the highlight areas.
🔍 Darken
Min(Base, Blend)
Per-channel minimum. Simple comparison. Good for exposure blending — keep the darkest areas from two layers.
⭐ Multiply
Base × Blend
Smooth, natural, white disappears. The workhorse. Use this 90% of the time. Most versatile in the group.
🔥 Color Burn
Contrast + Saturation
Darkens AND saturates. Stylized, dramatic shadows. Clips fast — use at lower opacity. White = no effect.
🖤 Linear Burn
Base + Blend − 1
Most aggressive. Inky blacks, clips fast. Graphic look. Use at very low opacity on photos. White = no effect.
Up Next — PS 48 (Final Lesson)
Blend Modes: The Lighten Group & Series Closer
The mirror image of the Darken group — five modes that only brighten, never darken. Plus a complete master reference for all blend modes, and the close of the 48-lesson Photoshop series.