: The human ear perceives notes an octave apart as similar. A chroma profile collapses all 88 piano keys into 12 bins , representing the 12 semitones (
In technical color science, chroma is often represented in polar coordinates: CIE L C h° (Lightness, Chroma, hue angle). A chroma profile modifies the (Chroma) value based on hue and luminance. chroma profile
sRGB has a smaller gamut, but its chroma response curve is linear and predictable. That is why it remains the gold standard for the web. Predictability beats maximal saturation for most applications. : The human ear perceives notes an octave apart as similar
: Scientists correlate the chroma profile of a fruit's skin with its Total Soluble Solids (TSS) and acidity to determine the perfect harvest date. sRGB has a smaller gamut, but its chroma
New standards like (used in Dolby Vision and ATSC 3.0) separate chroma from luminance even more cleanly than YCbCr. In ICtCp, the “Ct” and “Cp” channels form a chroma profile that is far more efficient for HDR and wide gamut.