A complete guide to convert RGB to LAB using the full RGB to LAB conversion formula. Understand the RGB and LAB color spaces and why LAB is used for accurate and device-independent color representation.
RGB to LAB Color Converter With Conversion Formula
RGB to LAB color conversion
What Is LAB (CIELAB)
LAB (or CIELAB) is an internationally recognized color space designed to represent colors as humans perceive them.
LAB has three components:
L* → Lightness (0 to 100)
a* → Green–Red axis (negative = green, positive = red)
b* → Blue–Yellow axis (negative = blue, positive = yellow)
Key advantages of LAB:
Device-independent color
More accurate than RGB
Used in photo editing and color correction (Photoshop, printers, color grading)
LAB ensures consistent color across all devices and materials.
Why Convert RGB to LAB
The RGB to LAB conversion is used when:
Performing color correction
Matching colors across devices
Image processing and computer vision
Designing for print & digital consistency
LAB is essential when color accuracy is the top priority.
RGB to LAB color conversion formula
Below is the complete RGB to LAB conversion formula explained step-by-step.
Final Output Format
L* = Lightness (0 to 100)
a* = Green ↔ Red
b* = Blue ↔ Yellow
RGB to LAB Color Table
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