DMC 3971 to Sullivans: Thread Conversion
The closest Sullivans equivalent to DMC 3971 (Medium Forest Green) is Sullivans 45340.
Close MatchHex #2A5820 · greens family
Only the DMC swatch is rendered as stored color data here. Compare the physical target skein before you assume a visual match.
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Conversion Notes
Sullivans 45340 is a close match for DMC 3971 Medium Forest Green and represents one of the better applications for the Sullivans option in the green family. Sullivans' performance is most competitive in mid-range shades where color complexity is lower and coverage expectations are standard — and medium forest green is precisely that profile. For background foliage fills, Christmas wreath body color, and tree canopy fills viewed from normal distance, 45340 serves the purpose well at an accessible price point without the quality concerns that sometimes appear in Sullivans' lighter or more subtly balanced shades.
Reference quality
How We Validate This Match
This Sullivans page is meant to help you shortlist a replacement quickly, then verify the physical skein before you mix brands in the same stitched area.
- Methodology
- This comparison uses the site's source-of-truth record for DMC 3971, the stored Sullivans equivalent, and the saved close rating before rendering the page copy.
- Verification status
- Close cross-brand match. Treat it as a shortlist, not proof that the physical threads will be visually identical under every fabric and light condition.
- Source basis
- Published cross-brand floss chart mapping. Use it as a shortlist, then confirm with physical thread because sheen and dye lots still matter.
- Last reviewed
- 2026-04-20
- Best use
- Close and approximate matches work best for replacements, backups, or whole-project brand swaps after you stitch a small sample on the target fabric.
Decision guide
When to trust DMC 3971 to Sullivans 45340
This page is strongest as a decision aid, not as a guarantee that two branded skeins will vanish into each other without testing.
Best for
- + Replacing missing floss when DMC 3971 is unavailable and Sullivans 45340 is good enough after a stitched sample check.
- + Shortlisting a Sullivans substitute before you buy skeins, especially if your project can tolerate small differences in sheen or dye lot.
- + Comparing this Sullivans candidate against the other conversions and nearby DMC shades linked from the page before you commit to a full swap.
Watch for
- ! Close matches are not safe to assume interchangeable in focal areas without a physical test on your fabric.
- ! Brand sheen, strand thickness, and project lighting can make DMC 3971 and Sullivans 45340 look further apart than the stored match rating suggests.
- ! If the design depends on smooth gradients or skin-tone transitions, compare this swap against the neighboring DMC shades before you substitute a large block.
Before you commit
- Compare DMC 3971 and Sullivans 45340: lay the physical skeins together in daylight before you mix brands in the same stitched area.
- Test on your project fabric: stitch a small sample so fabric color and stitch density reveal whether the match still holds at full coverage.
- Keep a fallback ready: if the swap feels off, use the linked related DMC shades or another brand conversion instead of forcing the closest stored match.
DMC 3971 to Sullivans FAQ
These answers are the same statements published in this page's FAQ structured data.
What is the Sullivans equivalent of DMC 3971?+
The closest Sullivans equivalent to DMC 3971 (Medium Forest Green) is Sullivans 45340. This is a close match.
Is the DMC 3971 to Sullivans conversion exact?+
The conversion from DMC 3971 (Medium Forest Green) to Sullivans 45340 is rated as a close match. Thread colors vary slightly between brands, so compare physical thread in daylight before stitching a large area.
Can I mix DMC 3971 and Sullivans 45340 in the same project?+
You can use DMC 3971 and Sullivans 45340 together when the close match is acceptable for your project, but always test them side by side on your fabric first because sheen and dye lots can create visible differences.
Other Conversions for DMC 3971
Similar DMC Colors
Shades closest to DMC 3971 — handy if Sullivans 45340 isn't quite right:
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