> For the complete documentation index, see [llms.txt](https://docs.viesus.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.viesus.com/features/features/skin-tone-enhancement.md).

# Skin Tone Enhancement

## Skin tone adjustment (`Lpars`)

Skin tones are easy to overcorrect. VIESUS detects faces and prevents them from becoming oversaturated.

## Example

{% columns %}
{% column %}
**Before (Skin)**

<figure><img src="https://919968377-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FG3eQlcnlDKtn9yl3mxsx%2Fuploads%2Fgit-blob-a8b797d2727dbaba4e5cca4942c37935b3a607f6%2F20250828_144059_viesus_default.jpg?alt=media" alt="Before — Color Zone Adjustments"><figcaption><p>Enhanced by VIESUS</p></figcaption></figure>
{% endcolumn %}

{% column %}
**After (Skin)**

<figure><img src="https://919968377-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FG3eQlcnlDKtn9yl3mxsx%2Fuploads%2Fgit-blob-728e2bdccfc231e92b8811131e01831e7735748e%2F20250828_144059_viesus_default_skin.jpg?alt=media" alt="After — Color Zone Adjustments"><figcaption><p>Enhanced by VIESUS with adjusted <code>Lpars.skin</code></p></figcaption></figure>
{% endcolumn %}
{% endcolumns %}

## Parameters

<table><thead><tr><th width="150.4000244140625">Parameter</th><th width="95">Range</th><th width="95">Default</th><th>Description</th></tr></thead><tbody><tr><td><code>skinToneAdjFac</code></td><td>0.0 – 1.0</td><td>0.2</td><td>Saturation reduction (adaptive) in face regions (prevents "glowing" faces)</td></tr></tbody></table>

## Skin color zone (`Lpars.skin`)

Fine-tune the skin tones globally. These parameters live in the `Lpars.skin` sub-section and use the same set as the other [local color corrections](/features/features/local-color-correction.md).

{% hint style="info" %}
**`Lpars.skin` targets a color range, not detected skin regions.** Warm, earthy tones like sand, desert rock, and sunset skies can fall into this zone too, not just skin.
{% endhint %}

<table><thead><tr><th width="144.800048828125">Parameter</th><th width="95">Range</th><th width="95">Default</th><th>Description</th></tr></thead><tbody><tr><td><code>strength</code></td><td>0.0 – 1.0</td><td>1.0</td><td>Overall strength of adjustments for the skin zone</td></tr><tr><td><code>brightness</code></td><td>-1.0 – 1.0</td><td>0.0</td><td>Brightness adjustment for the skin zone</td></tr><tr><td><code>contrast</code></td><td>-1.0 – 1.0</td><td>0.0</td><td>Contrast adjustment for the skin zone</td></tr><tr><td><code>saturation</code></td><td>-1.0 – 1.0</td><td>0.0</td><td>Saturation adjustment for the skin zone</td></tr><tr><td><code>huerotation</code></td><td>-10 – 10</td><td>0.0</td><td>Hue rotation for the skin zone</td></tr></tbody></table>

{% hint style="success" %}
**Recommended:** Leave `skinToneAdjFac` at 0.2 — it keeps faces from glowing while preserving natural color. Adjust the `Lpars.skin` zone only when you need to target skin tones specifically; VIESUS already balances them automatically.
{% endhint %}


---

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