About Adjust Channels
A channel adjuster changes how much red, green, and blue an image contains. This tool multiplies each channel of every pixel by its own percentage from 0 to 200, and values that pass 255 are clipped. Setting a channel to 0 removes that color entirely. Lowering blue warms a cold photo, and lowering red cools a warm one. The alpha channel is not changed.
How to use Adjust Channels
- Choose an image, or drag it onto the upload area. The file is read by your browser and is not uploaded.
- Set "Red", "Green" and "Blue". The preview updates as you change them.
- Check the preview, then press "Download result" to save the file.
Questions about Adjust Channels
How do I remove a yellow or blue color cast?
A yellow cast means too little blue, so raise blue or lower red and green slightly. A blue cast is the opposite: lower blue a little. Make small changes and watch an area that should look neutral gray or white.
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