Represents different levels of Chroma (color intensity).
All values are typically non-negative.
C_0: Minimum chroma
C_mid: Middle chroma
C_max: Maximum chroma
Example usage:
Cs cs = getCs(L, a_, b_);
// Different chroma levels are used in interpolation:
double C = k_0 + t * k_1 / (1 - k_2 * t);
// where k_0, k_1, k_2 are derived from cs.C_0, cs.C_mid, and cs.C_max
Represents Lightness and Chroma.
L: Lightness, typically in range 0, 1
C: Chroma, can exceed 1 for highly saturated colors
Example usage:
LC cusp = findCusp(a_, b_);
// L and C are used in calculations:
double L_0 = cusp.L + 0.5 * (sgn(Ld) * (e1 - math.sqrt(e1 * e1 - 2 * k * math.abs(Ld))));
Represents a color in the RGB color space.
All components are typically in range 0, 1 for sRGB.
For linear RGB, values can exceed 1 for colors outside the sRGB gamut.
Example usage:
RGB rgb = oklabToLinearSrgb(Lab(0.5, 0.1, -0.1));
// Values are clamped when converting to sRGB:
double r_srgb = srgbTransferFunction(rgb.r);
Alternative representation of (L_cusp, C_cusp)
Encoded so S = C_cusp/L_cusp and T = C_cusp/(1-L_cusp)
The maximum value for C in the triangle is then found as min(SL, T(1-L)), for a given L
