Provides a variety of little tweaking-options, like Vibrance, WB-Slider, Tint, etc.
img = connect the main plate you want to treat
mask = masks the effect by a connected alpha-channel
Just connect your plate and play with the controls, it's pretty straight forward :)
Under the hood, the Tweaky transforms colourspaces left and right to give controls on things like white blance, tint, vibrance and other options you may or may not know from classic raw-development software.