Flag Color Comparator: Romania vs. Chad & Lookalike Flag Inspector

Romania vs Chad Optical Split-Lens

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Romania

Chad

Lighting:

Split: 50%

Spectral Colorimetry (ΔE₀₀) Blue ΔE: 5.84

Geometry & Aspect Ratio: 0.00: Both standardized at 2:3

Perceptible chromatic difference in blue stripe (ΔE00 > 2.3 threshold); Chad utilizes deeper Indigo while Romania specifies Cobalt Blue.

Vexillological Colorimetry & The CIEDE2000 Metric

National flags are legally specified via standard color spaces (Pantone, RAL, or sRGB). When two nations adopt visually identical layouts (such as Romania & Chad's vertical tricolors, or Monaco & Indonesia's horizontal bicolors), distinction depends strictly on CIEDE2000 color difference (ΔE₀₀) and proportional aspect ratios.

A ΔE₀₀ < 1.0 is imperceptible to human vision; 1.0–2.3 is the standard Just Noticeable Difference (JND) under strict laboratory conditions; and ΔE₀₀ > 2.3 marks clear field perceptibility. Romania officially standardizes on Cobalt Blue (#002B7F), whereas Chad mandates a deeper Indigo Blue (#00205B) adopted to honor their historical flag design.