ASTM variant of CIE Standard Illuminant D65. ~6500K color temperature; approximates average daylight in Europe. This uses the XYZ values defined in the ASTM E‑308 document.
Raw precise variant of CIE Standard Illuminant D65. ~6500K color temperature; approximates average daylight in Europe. This uses XYZ values calculated from raw 1nm SPD data, combined with the CIE 1931 2-degree standard observer.
sRGB variant of CIE Standard Illuminant D65. ~6500K color temperature; approximates average daylight in Europe. This uses the white point chromaticities defined in the sRGB specification.