J42 Color Matrix Tool uses a 4x5 matrix to transform the color components of an image. The tool can change the brightness, contrast, saturation and much more.

You can remove all color from an image or modify a single red, green or blue component.

Use one of the many filter presets to modify color. You can even swap two colors for some amazing effects.

Filters include:

Brightness
Saturation
Contrast
Negative
White Inverter
RGB Inverters
Tint - Red/Cyan
Tint - Green/Magenta
Tint - Blue/Yellow
RGB Push/Pull
Swap - Red/Greed
Swap - Red/Blue
Swap - Green/Blue