DMC 300 to Cosmo: Thread Conversion

DMC 300 Very Dark Mahogany embroidery floss

The closest Cosmo equivalent to DMC 300 (Very Dark Mahogany) is Cosmo 131.

Close Match

Hex #6F2F00 · browns family

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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.

DMC 300 #6F2F00
92% match
Stored match for Cosmo 131 Cosmo 131 Cosmo 131 does not have an official hex preview stored on this site. Treat the page as a physical skein shortlist, then verify the real thread in person before you rely on the match.

Only the DMC swatch is rendered as stored color data here. Compare the physical target skein before you assume a visual match.

Amazon: DMC 300 → LoveCrafts: DMC 300 → Amazon: Cosmo 131 →

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Conversion Notes

Cosmo 131 is a close match in the very dark mahogany range with Cosmo's characteristic softer hand. The red-warm character that makes 300 distinctive — that near-black brown that glows with red fire rather than simply going cold and dark — is the essential quality to confirm in the Cosmo version. Cosmo 131 may lean slightly less red and slightly more neutral brown than the DMC original, a subtle drift that's unimportant in standalone applications but can disrupt the mahogany family's cohesion in gradient work. In the mahogany gradient where 300 sits alongside 301, 400, and 3776 — all of which have the consistent red-brown character that defines the family — a darkest step that reads as more neutral will look like an outsider in the sequence rather than the family's natural shadow anchor. Test Cosmo 131 in context, not just against DMC 300 alone, but against the other mahogany threads in your palette, before committing it to the darkest shadow position. For standalone uses where 300 appears surrounded by non-mahogany colors — sepia portrait shadows, dark shadow fills in mixed-brown designs, furniture shadow work in a varied palette — the close match is generally adequate if the red warmth is confirmed present.

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 300, 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.

Read the Stitchies methodology

Decision guide

When to trust DMC 300 to Cosmo 131

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 300 is unavailable and Cosmo 131 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 300 and Cosmo 131 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

  1. Compare DMC 300 and Cosmo 131: lay the physical skeins together in daylight before you mix brands in the same stitched area.
  2. Test on your project fabric: stitch a small sample so fabric color and stitch density reveal whether the match still holds at full coverage.
  3. 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 300 to Cosmo FAQ

These answers are the same statements published in this page's FAQ structured data.

What is the Cosmo equivalent of DMC 300?+

The closest Cosmo equivalent to DMC 300 (Very Dark Mahogany) is Cosmo 131. This is a close match.

Is the DMC 300 to Cosmo conversion exact?+

The conversion from DMC 300 (Very Dark Mahogany) to Cosmo 131 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 300 and Cosmo 131 in the same project?+

You can use DMC 300 and Cosmo 131 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.

← All conversions for DMC 300 Browse browns colors

Other Conversions for DMC 300

DMC 300 → Anchor 352 DMC 300 → Madeira 2304 DMC 300 → Sullivans 45048 DMC 300 → J&P Coats 5356 DMC 300 → Dimensions 6108 DMC 300 → Bucilla 930 DMC 300 → Candamar 6108

Similar DMC Colors

Shades closest to DMC 300 — handy if Cosmo 131 isn't quite right:

DMC 918

Dark Red Copper

DMC 801

Dark Coffee Brown

DMC 433

Medium Brown

DMC 400

Dark Mahogany
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