Most color adjustments in RGB mode quickly look unnatural because the red, green, and blue channels control both color and brightness simultaneously. LAB color mode separates lightness from color information, letting you make dramatic color changes while preserving the original tonal range and depth of your image.
This approach gives you far more flexibility when pushing colors to creative extremes without the flat, oversaturated look that often results from aggressive RGB adjustments.
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Practical Tips
These techniques will help you master LAB color mode for professional color grading:
- Convert to LAB mode by going to Image > Mode > LAB Color after duplicating your background layer to a new document
- Use the Lightness channel to control brightness without affecting colors, and A/B channels for pure color adjustments
- Try the hand tool with up/down arrows in Curves to click and drag specific areas of your image for targeted color changes
- Create contrast in the A and B channels by pulling opposite ends of the curve to add complementary color combinations
- Merge your LAB edits with Shift+Option+Command+E, then drag the result back to your original RGB document
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