Cie 2000 Delta E Calculator

CIE 2000 Delta E Formula:

\[ \Delta E_{00} = \sqrt{ \left( \frac{\Delta L'}{k_L S_L} \right)^2 + \left( \frac{\Delta C'}{k_C S_C} \right)^2 + \left( \frac{\Delta H'}{k_H S_H} \right)^2 + R_T \frac{\Delta C'}{k_C S_C} \frac{\Delta H'}{k_H S_H} } \]

L1 (Standard):

a1 (Standard):

b1 (Standard):

L2 (Sample):

a2 (Sample):

b2 (Sample):

Delta E (ΔE00):

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1. What is CIE 2000 Delta E?

The CIE 2000 Delta E (ΔE00) is an advanced color difference formula developed by the International Commission on Illumination (CIE). It provides a more perceptually uniform measure of color difference compared to earlier formulas like CIELAB ΔE*ab.

2. How Does the Calculator Work?

The calculator uses the CIE 2000 Delta E formula:

Where:

\( \Delta L' \) — Difference in lightness
\( \Delta C' \) — Difference in chroma
\( \Delta H' \) — Difference in hue
\( k_L, k_C, k_H \) — Weighting factors (usually 1.0)
\( S_L, S_C, S_H \) — Compensation functions
\( R_T \) — Rotation function for blue region

Explanation: The formula accounts for non-uniformities in the CIELAB color space and provides better correlation with human visual perception.

3. Importance of Delta E Calculation

Details: Delta E is crucial in color-critical industries like printing, textiles, automotive, and digital imaging for quality control, color matching, and ensuring color consistency across different media.

4. Using the Calculator

Tips: Enter L*a*b* values for both standard and sample colors. The calculator will compute the color difference using the CIE 2000 formula. Lower ΔE values indicate closer color matches.

5. Frequently Asked Questions (FAQ)

Q1: What do different Delta E values mean?
A: ΔE < 1: Not perceptible by human eye; 1-2: Perceptible through close observation; 2-10: Perceptible at a glance; >10: Colors are different

Q2: Why use CIE 2000 instead of older formulas?
A: CIE 2000 provides better perceptual uniformity, especially in blue and neutral regions, and better matches human vision.

Q3: What are typical L*a*b* value ranges?
A: L*: 0-100 (lightness), a*: -128 to +127 (green-red), b*: -128 to +127 (blue-yellow)

Q4: When is CIE 2000 most useful?
A: For color-critical applications where precise color matching is required, such as brand colors, product manufacturing, and quality control.

Q5: Are there limitations to this formula?
A: While improved, it's not perfect for all viewing conditions and may still have some discrepancies in certain color regions.