This work is devoted to the issues of colorimetric measurements in hardware and software environments using technologies of digital image processing. Such measurements can be implemented by ensuring metrological traceability of results to standards or reference materials. The main idea of the research is to model and build a reference scale in a functional vector color space in space by creating a set of measures (reference samples) sources. To select the color space XYZ on sectors and build in each sector the calibration characteristics is proposed in this paper. This procedure allows to reduce the methodical component of uncertainty and to do measurements in hardware and software environments.