cyan and orange practicals in joker?

[Johanan Pandone]

The Joker film has some interesting stylized practicals, often combining very warm practicals and very cool practicals. Is there a way to acheive this look without using gels or sleeves? Maybe mixing daylight and tungsten practicals and whitebalancing around 4500k? How is this done?

jk.jfif

[David Mullen ASC]

Setting the camera to the 4000K range will make tungsten look warm and daylight lamps look blue, but in terms of making blue look cyan instead (blue + green), you need to use cool light sources with that green cast (like Cool White fluorescents, mercury vapor lamps, etc.) or use green or cyan gels or use RGB LEDs where cyan can be dialed in, like with Astera tubes. 

Or color-correct the image and shift the blue channel to cyan, though then things like blue skies will also shift to cyan unless you start using Power Windows to separate blue objects from each other.

At some point, a movie like "The Joker" would have done any of these things depending on the scene.