Here are my intermediate calculations and final result. LibreOffice Calc matches these to at least 10 decimal places.
RGB: 296, 201, 582 linear RGB: 8.758182114365178, 2.294156077537514, 181.318064547253950 LMS: 16.409278140338003, 23.564657907655260, 163.641839918836380 L'M'S': 0.340119247638553, 0.371321802469549, 0.558280898594428 ITP: 0.355720525054051, 0.134646687344927, -0.161395069575210
XYZ: 36, 15, 190 linear RGB: 8.324787549324366, 3.242605588197572, 178.993068703904130 LMS: 16.578871332020118, 23.913465998086739, 161.609510857943010 L'M'S': 0.340986826660932, 0.372617052519958, 0.556989183424851 ITP: 0.356801939590445, 0.132090117162939, -0.162924537942205
dE ITP: 2.281932290568818 |