DMC 309 to Cosmo: Thread Conversion
The closest Cosmo equivalent to DMC 309 (Dark Rose) is Cosmo 107.
Close MatchHex #BA4A4A · pinks 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 107 is listed as close for DMC 309 Dark Rose. The cool-pink-to-crimson character that makes DMC 309 so distinctively useful — that specific deep saturated rose that is not orange-warm but not purple-cool, sitting firmly in the deep charged-pink zone — is the quality to verify in the Cosmo version. A Cosmo version that runs slightly warmer pushes into a more orange-tinged deep pink; one that runs slightly cooler approaches the garnet-cranberry zone. Neither extreme is wrong for every application, but both would change the relationship between DMC 309 and the adjacent lighter rose-family threads in a gradient. For very large fill areas where any color variation would be noticeable across the broad stitched field, the exact-match Anchor and Madeira alternatives are more reliable. For accent and shadow uses where DMC 309 appears in relatively small quantities — the interior shadows of a rose bloom, the deep fold of a fuchsia petal, the darkest value in a dahlia center — the close match is generally adequate if the warmth character is confirmed. Cosmo's softer thread construction produces slightly flatter stitches, which in deep shadow roles can actually enhance the sense of depth and visual recession in floral rendering.
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 309, 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 309 to Cosmo 107
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 309 is unavailable and Cosmo 107 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 309 and Cosmo 107 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 309 and Cosmo 107: 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 309 to Cosmo FAQ
These answers are the same statements published in this page's FAQ structured data.
What is the Cosmo equivalent of DMC 309?+
The closest Cosmo equivalent to DMC 309 (Dark Rose) is Cosmo 107. This is a close match.
Is the DMC 309 to Cosmo conversion exact?+
The conversion from DMC 309 (Dark Rose) to Cosmo 107 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 309 and Cosmo 107 in the same project?+
You can use DMC 309 and Cosmo 107 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 309
Similar DMC Colors
Shades closest to DMC 309 — handy if Cosmo 107 isn't quite right:
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