Color levels

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Levels can correct the tonal range and color balance of an image.



'colorlevel.white' is set on a scale from 1 to 255, where 255 is the default.

White level increased


'' is set on a scale from 0 to 254, where 0 is the default.

Black level increased

Black and white together

Black and white levels can be applied at the same time:

Black and white levels changed

Pure white background

Levels can be used to obtain pure white backgrounds, desirable for ecommerce product photography. Below, Sirv turns an off-white background to pure white. Then it shows an automatically cropped version, using Sirv's autocrop feature:

Autocrop and white levels
Increased white levels
Autocrop and white levels


Sirv can generate a histogram of your image, to help you understand its tonal range. It analyses each pixel of your image and plots it as a chart. The chart's numerical range goes from 0-255, counting pixels of 0 as totally black and pixels of 255 as totally white.

'histogram' can be set as 'rgb' (for red, green and blue), or any of r/g/b separately.

Histogram of RGB colors

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