The Tone Curve is a powerful tool used for advanced tonal adjustments and is available in both Cinemagraph Pro 2 for macOS and iOS.
The colors apparent in any video you record will depend on the type of lighting your camera captures. For example, recording footage under Tungsten (incandescent) lighting will add a yellowish cast to your video while recording footage under fluorescent lighting will add a blueish cast.
Similarly, when you record video on a cloudy day, the colors will appear on the cooler side while on a sunny day, they'd appear on the warmer side. Choosing the appropriate white balance setting is one way to help remove unrealistic color casts but more advanced tonal adjustments are often required. You can use the tone curve to remove unwanted color casts, manipulate exposure, apply contrast, and more.
Videos are composed of red, blue, and green color channels. Under the Adjustments tab in Cinemagraph Pro 2 for macOS and iOS, you can modify the blacks, shadows, highlights, and whites in the individual or RGB color channels.
Let's say you recorded a video under incandescent lighting but you want to convey a mysterious setting with cooler tones. You could simply adjust the color temperature by moving the corresponding slider to the left, but that'd change the color temperature in your entire cinemagraph.
The tone curve adjustments will allow you to make adjustments to specific parts of your cinemagraph. For example, if you only wanted cooler tones to appear in the lighter areas of your cinemagraph, you could try increasing the value for highlights and whites in the blue color channel.
Now let's take this one step further. Let's say that you're satisfied with the tonal adjustments you made in the blue color channel but want to see what a purplish tint would look like. Color theory teaches us that blue + red = purple. Knowing that, you can increase the value for highlights and whites in the red color channel as well to apply a purplish tint.
If you don't have any prior editing experience using the tone curve, we recommend experimenting to gain a better understanding of how it works. Try creating a few Instagram-like filters to apply to one of your cinemagraphs. In Cinemagraph Pro for macOS, you can save them as custom presets to apply to future cinemagraphs.