DMC 154 to Cosmo: Thread Conversion

Cosmo 283 is a close match in the very dark grape range. Cosmo's softer thread construction produces a slightly flatter stitch surface at this dark value, which can improve coverage uniformity across large fills where you want a consistent, velvet-like depth rather than the slight texture variation DMC's firmer twist creates. Verify that the warm, red-leaning grape character is preserved in the Cosmo version — a substitute that shifts too blue will read as dark violet rather than grape, which changes the color family identity entirely.