DMC 3812 to Sullivans: Thread Conversion

Sullivans 45409 is rated close for DMC 3812 Very Dark Seagreen and provides a workable substitute in most dark blue-green applications. The deep marine blue-green character useful for seascape depth positions, Japanese pond water fills, and dark aquatic shadow work is approximated in Sullivans' version at a level adequate for most decorative stitching. Sullivans' characteristic sheen is essentially imperceptible at this dark saturated value — dark, rich colors absorb surface quality differences that are visible at lighter values, and the sheen concern that applies to Sullivans at mid-range or pastel values does not apply here. For dark fabric accent work where 3812 creates a deep teal reading against black evenweave — the Northern Lights or deep-sea atmosphere application — Sullivans' slight surface brightness at dark values can actually enhance the jewel-like quality of the effect. Dye lot consistency is worth verifying when sourcing multiple skeins for large seascape backgrounds, where consistent dark-blue-green depth across extended fills matters more than in small accent applications. For the accent uses, dark water details, and supporting shadow positions where a single skein suffices, Sullivans 45409 is a practical and accessible option. Madeira 1203's exact match is the more reliable choice for seascape shadow fills where the specific blue-green balance of 3812 must be maintained precisely throughout.