I want to use a CMS software which requires input values in RGB format for white balance and gamma corrections. It also requires xy values from primaries and white for chromatic adaptation but it was an easy conversion. I could easily create the required custom test chart and take the measures but I have a ti3 file with XYZ values and I need RGB values. Is there an easy way to convert my 256 XYZ coordinates into RGB format? The target color space is Rec709 (sRGB primaries and D65 white), I think... Or do I miss something here?