When using artificial lighting, a common problem that needs correcting in post is false color or color casts created. In the video above I show you what a color cast from an LED light looks like and how to go about removing it with your editing software in post production. First we shot a video clip of me in the studio while lit with only a single LED light source. The camera and the LED were both dialed in at 5500K (daylight). I bring into frame a neutral color 18% grey card with black and white. This card serves to give us a reference point to calibrate the overall color of the clip later on in post.
After bringing the clip into Final Cut Pro, I open the video scopes so I can see the highlights, mids, shadows, and RGB values of the video. In order to find the truest color possible, I want to color balance only the area where the grey card is present. To do this, I simple crop the screen so only the grey card is showingNow, using the color adjustment, I am able to dial in the levels that I want. Since we are adjusting to the neutral grey card, I want all of these levels to be pretty evened out.
Next I remove the crop to reveal the now correct color balanced video clip. The color cast that was present prior to the correction is now gone and the video has a more true color. You can see the difference in the before and after clips at the end of the video.
We used an 18% grey card by Digital Grey Kard. They also supply color options and mobile laniard cards for tight shots. We got ours from eBay following the link (Click Here).
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Digital Grey Kard
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