Vibrancy calculator

Color vibrancy is the perceived intensity, liveliness, and visual energy of a color. In color theory, vibrant colors appear rich, vivid, and attention-grabbing, while dull colors feel muted or washed out. Vibrancy is strongly influenced by chroma, which represents the purity or saturation of a color, but it is also affected by lightness. Colors with very low or very high lightness often appear less vibrant, even when highly saturated, because the human eye perceives the strongest visual richness around mid-lightness ranges. As a result, vibrancy is not simply “how saturated” a color is, but how balanced its saturation and brightness feel together.
You can find more details about color vibrancy here.