Caution with colour calculations: spectral purity is a poor descriptor of flower colour visibility.

Ann Bot · 2022 · PMC9295922 · PMID 35726715

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highly significantP < 0.001actually significant

All five analyses using the hexagon model to calculate both colour contrast and spectral purity yielded highly significant correlations with an extremely high correlation coefficient (ρ: 0.86–0.99, P < 0.001; Fig. 3A–D ).

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