# Image Color Adjust

Change brightness, saturation, hue and lightness of an image in one step. Brightness and saturation are multipliers from 0 to 3, hue rotates colors by up to 180 degrees in either direction and lightness adds or removes up to 100 units of perceptual lightness. A quick all in one color correction for product shots, social media images and creative recoloring.

## Frequently asked questions

### What does each slider do?

Brightness multiplies the overall brightness, saturation multiplies the color intensity and hue rotates every color around the color wheel. Lightness then adds a fixed amount of perceptual lightness to every pixel. The defaults of 1, 1, 0 and 0 leave the image unchanged.

### How is brightness different from lightness?

Brightness is a multiplier, so it scales dark and light tones proportionally and keeps black as black. Lightness is an offset, so it lifts or lowers all tones by the same amount and can turn black into gray. Use brightness for exposure style changes and lightness for a flatter, airy look.

### How do I turn an image black and white?

Set saturation to 0. All color is removed while the brightness of each area is kept, giving a neutral grayscale result that is still saved as an RGB PNG. Values between 0 and 1 give a muted, partially desaturated look.

### What can I do with the hue rotation?

Hue rotation shifts every color by the same angle, so 120 degrees turns red into green and green into blue. It is useful for recoloring product variants, icons or backgrounds. Whole degrees from -180 to 180 are accepted, and both ends give the same result.

### Can I combine all four adjustments?

Yes, all settings are applied together in one pass of the sharp modulate operation. Brightness, saturation and hue are applied first and the lightness offset is added afterwards. That avoids the quality loss of running several separate tools.

### What happens at extreme values?

Brightness or saturation of 3 triples the value and quickly clips bright areas to white or fully saturated colors. Brightness 0 produces a black image. Lightness of 100 or -100 pushes most pixels to white or black, so moderate values usually look best.

### Is transparency preserved?

Yes, the alpha channel is untouched and transparent areas stay transparent. Grayscale uploads are converted to RGB so hue and saturation changes can apply. The result downloads as a PNG.

### Which file formats can I use?

JPEG, PNG, GIF, WebP, TIFF and AVIF images up to 5 MB are accepted. Animated images are reduced to their first frame and anything larger than 4000 pixels on a side is scaled down to fit. The output is always PNG.

### In which color space are the changes made?

The modulate operation works on the lightness, chroma and hue representation of each color, which keeps brightness changes visually even. The result is converted back to standard sRGB. This is why a hue rotation does not noticeably change how light an area looks.

### Is this the same as the separate brightness, saturation and hue tools?

It covers the same ground in a single tool, which is faster when you need more than one change. The dedicated tools keep their own behavior and ranges. Use this one when you want to dial in a complete color correction at once.

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