Measuring 530 x 370 mm, the ColorChecker Classic XL from Calibrite is a checkerboard array of 24 scientifically prepared colored squares in a wide range of colours. Many of these squares represent natural objects of special interest, such as human skin, foliage, and blue sky. These squares are not only the same colour as their counterparts, but also reflect light the same way in all parts of the visible spectrum. Because of this unique feature, the squares will match the colors of natural objects under any illumination and with any color reproduction process.

The ColorChecker provides a totally non-subjective standard of comparison to help determine the true color balance of any color rendition system, and it provides the needed standard for comparing, measuring, and analyzing differences in colour reproduction in various processes, thereby avoiding costly mistakes.