How to Use an RGB On-Camera Light for Video and Photos

By The Camera Exchange | Published: 2026-11-01

Category: How-to Guides

Learn a practical workflow for using an RGB on-camera light, from setting color temperature to adding subtle fill, with a step-by-step setup for the Chroma CL36.

Quick answer

Start with a correct white balance and a daylight-matched key light, then add RGB color only as a deliberate accent or fill. Keep the colored light dimmer than your key and check the result on a calibrated monitor or your camera's histogram.

Why color temperature comes before color

RGB lights can produce any hue, but they still need a neutral starting point. If your on-camera light is set to a strong color while your camera's white balance is fixed for daylight, skin tones will shift and the footage will be hard to correct. Set the light to a white or slightly warm white first, confirm the exposure, and only then introduce color as a separate step.

This order also makes the effect repeatable. Once you know the neutral setting that matches your scene, you can return to it quickly between takes or when moving between rooms with different ambient light.

When an RGB on-camera light is the wrong tool

An on-camera light sits close to the lens, so colored output can flatten faces and reduce contrast. For a strong colored key or a dramatic side light, a larger off-camera fixture usually gives more control. Use the on-camera RGB light for subtle fill, background accents, or a practical color wash when you need to travel light.

Also consider the room. In a small space with white walls, a colored on-camera light will bounce and tint the whole scene. You may need to lower the intensity or flag the light to keep the color where you want it.

Step-by-step RGB on-camera light setup

Set a neutral white balance: Mount the light on your camera, set it to a white or slightly warm white, and set your camera's white balance to match the ambient light. Check the image on the LCD or histogram. Common mistake: leaving auto white balance on, which can fight the colored light later. Lock white balance before adding color.
Dial in the key exposure: Adjust the light's brightness so the subject is properly exposed without clipping highlights. Use the camera's zebras or histogram. Common mistake: setting the light too bright and then trying to fix it with color, which reduces contrast. Expose for the neutral light first.
Choose a color with a purpose: Pick a hue that supports the mood or separates the subject from the background. For a subtle fill, use a low saturation or a complementary color at low intensity. Common mistake: choosing a fully saturated color at full power, which overwhelms skin tones. Start with low saturation and low intensity.
Position for fill, not key: Keep the colored light slightly off-axis from the lens and dimmer than your main light. If the color spills onto the background, flag it or move it closer to the subject. Common mistake: placing the colored light directly on the lens axis, which flattens the face. Colored light should support, not dominate.
Check and refine on set: Review a test clip or photo on a calibrated monitor or your camera's screen. Look for unnatural skin tones and unwanted color casts. Adjust intensity or hue in small increments. Common mistake: judging color on an uncalibrated phone screen. Verify color on a reliable display.

Product facts

ProMaster Chroma CL36 RGB LED Light 3.0: The ProMaster Chroma CL36 RGB LED Light 3.0 is an on-camera RGB light with a catalog price of USD 64.97. This makes it an affordable option for adding color accents without committing to a full lighting kit.
ProMaster Chroma CL36 RGB LED Light 3.0