... Color: X, Y, Z; Y, x, y; L*, a*, b*; L, a, b; L*, u*, v*; L*, c*, h*l Color difference ... : Δ E (L*a*b*); ΔE (Lab); ΔE (L*u*v*); ΔL*, ΔC*, ΔH*l ... Whiteness: Gans whitenessl Blu-ray whiteness: W=Bl Tabble: W=4B-3G Spectroscopical Color Photometer (400nm~700nm)