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After Effects' Tritone weighs the working-space values with Rec. 601 (0.299, 0.587, 0.114), as its Tint does; EffectCraft used Rec. 709. Case 718 (red solid, Highlights [1,1,0.8], Midtones [0.6,0.2,0.2], Shadows [0,0,0.3], Blend 25): AE (132, 23, 46), EffectCraft was (113, 16, 49), now (132, 23, 46). On a grey ramp (case 815) the shadows / midtones / highlights mapping already matched and still does within 1/255. CPU and GPU (fx_color op 4). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>