One of the most powerful moves in color grading is changing a single color while leaving everything else alone: cooling just the sky, warming just the skin, or swapping a brand color entirely. The tool that does it is the HSL qualifier, and CreativePass includes one right in its node editor. Here's how it works.
What is an HSL qualifier?
HSL stands for Hue, Saturation, and Lightness. A qualifier lets you select a range of pixels based on those three properties, essentially saying "only affect pixels that are this hue, this saturated, and this bright." The result is a mask built from color itself, not a shape you draw. That's why it's called a secondary grade: your primary grade sets the overall look, and qualifiers refine specific colors on top.
When to reach for one
Use a qualifier when the thing you want to change is defined by its color: making foliage greener, pulling teal into a sky, fixing a blotchy skin tone, desaturating a distracting background color, or matching a product's color to a brand spec. Anytime you'd think "I just want to grab that color," a qualifier is the answer.
How to use it, step by step
- Add an HSL Qualifier node in the CreativePass node editor and feed your image into it.
- Pick the target color by sampling the hue you want to isolate, like the blue of the sky.
- Refine the selection by narrowing or widening the hue, saturation, and lightness ranges until only your target is selected.
- Soften the edges with the selection's blur/feather so the change blends naturally instead of looking cut out.
- Grade the isolated area: shift its hue, push or pull saturation, brighten or darken it, all while the rest of the frame stays untouched.
Tips for a clean key
Start with a tight selection and loosen it gradually, since it's easier to add than to subtract. Watch for noise: if your selection sparkles in flat areas, widen the lightness range slightly or add a touch of feather. And keep changes believable; the eye forgives a subtle hue shift but notices an over-saturated, glowing patch immediately. For tricky subjects, stack a shape or Magic Mask with the qualifier to limit it to one region.
Why it beats a basic saturation slider
A global saturation or HSL slider affects every instance of a color in the frame. A qualifier on a node, combined with masks, gives you surgical control: change the shirt without changing the sky, fix one face without shifting the whole scene. That precision is what makes edits look intentional and professional.
Try secondary grading in CreativePass: Download CreativePass on the App Store.