DMC 580 to Cosmo: Thread Conversion
The closest Cosmo equivalent to DMC 580 (Dark Moss Green) is Cosmo 634.
Close MatchHex #888D33 · greens family
This Cosmo conversion is based on approximate data that has not been independently verified. If you notice an error, let us know — community corrections help everyone.
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
Cosmo 634 is a close match in the dark moss-green zone, but the yellow-green warmth that makes DMC 580 distinctive may be slightly attenuated. The risk with any close substitute for this color is losing the almost-chartreuse quality that makes moss green feel biologically alive rather than simply dark and green. Hold Cosmo 634 against DMC 581 if you’re using both as a paired family — if the two Cosmo equivalents read as cohesively related in warmth and darkness, the substitution works well for the moss palette. If Cosmo 634 reads as more conventionally dark green without the yellow punch, it won’t serve the same role in forest floor or stone wall compositions. A practical substitute for general dark warm-green fill work where botanical precision is less critical.
Reference quality
How We Validate This Match
This Cosmo 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 580, the stored Cosmo 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
- Approximate cross-brand floss mapping. Treat it as lower-confidence until you compare the physical Cosmo skein against the DMC reference.
- 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 580 to Cosmo 634
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 580 is unavailable and Cosmo 634 is good enough after a stitched sample check.
- + Shortlisting a Cosmo substitute before you buy skeins, especially if your project can tolerate small differences in sheen or dye lot.
- + Comparing this Cosmo 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 580 and Cosmo 634 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 580 and Cosmo 634: 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 580 to Cosmo FAQ
These answers are the same statements published in this page's FAQ structured data.
What is the Cosmo equivalent of DMC 580?+
The closest Cosmo equivalent to DMC 580 (Dark Moss Green) is Cosmo 634. This is a close match.
Is the DMC 580 to Cosmo conversion exact?+
The conversion from DMC 580 (Dark Moss Green) to Cosmo 634 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 580 and Cosmo 634 in the same project?+
You can use DMC 580 and Cosmo 634 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 580
Similar DMC Colors
Shades closest to DMC 580 — handy if Cosmo 634 isn't quite right:
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