Isacord 40 3631 - Tufts Blue
Isacord 3631 is the 40 cone for Tufts Blue. Below: every spec you'd want to look up plus the cross-brand equivalents in case Isacord isn't what you stock.
Closest Pantone match
The nearest Pantone Coated swatch to Isacord 3631, ranked by perceptual color distance (CIEDE2000). The lower the ΔE, the closer the match.
Cross-brand alternatives
If your shop stocks a different brand, here are the closest equivalents to Isacord 3631 - ranked by perceptual color distance (CIEDE2000). Anything under ΔE 2 is visually indistinguishable; under ΔE 5 is acceptable for most production work.
| Swatch | Brand | Code | Name | HEX | ΔE |
|---|---|---|---|---|---|
| Coats Sylko | B7484 | Medium Blue | #436FAD |
2.05 | |
| Floriani PolyEmbroidery | OO7 | N / A | #406EA9 |
2.14 | |
| Isacord 40 | 3410 | Rich Blue | #4F6DA1 |
2.27 | |
| Madeira Classic Rayon | 1143 | Jay Blue | #4B6B99 |
2.41 | |
| Floriani PolyEmbroidery | K07 | Solar Blue | #3E72A7 |
2.63 | |
| Coats Sylko | B7491 | Medium Blue | #3B6DA4 |
2.78 | |
| Isacord 40 | 3713 | Cornflower Blue | #3371AE |
3.76 | |
| Madeira Polyneon 40 | 1943 | Violet | #5B70AC |
4.47 | |
| Madeira Classic Rayon | 1335 | Violet | #4565A2 |
4.49 | |
| Robison-Anton Rayon | 2529 | Dolphin Blue | #3A75C4 |
4.60 | |
| Madeira Polyneon 40 | 1733 | Violet | #3B7BB0 |
5.54 | |
| Robison-Anton Rayon | 2614 | Pro Lusty Blue | #5B77CC |
6.63 |
How to use Isacord 3631
Isacord 3631 (Tufts Blue) is one of the most-stocked blues in promotional embroidery - reads navy on light fabrics and stays distinct from black under standard shop lighting. Common on corporate polos, university merch, and trade-show apparel.
If you're spec'ing a new logo, start by matching PMS 5405 C in the customer's brand standards, then pick whichever brand line your machines run. The cross-brand table above is the lookup you'd do at the digitizing stage.
Try the full Thread Color Matcher to convert any PMS, hex, or image color into thread matches across all 5 brands at once.
Frequently asked
What hex code is Isacord 3631?
Isacord 40 3631 (Tufts Blue) is hex #4C71A0, RGB 76/113/160.
What PMS color is closest to Isacord 3631?
The nearest Pantone Coated match is PMS 5405 C (#4F758B), with a perceptual color distance of ΔE 8.1 from Isacord 3631. Lower ΔE means closer match - under 2 is visually indistinguishable, under 5 is acceptable for production.
What's the closest equivalent to Isacord 3631 in Coats?
Coats Sylko B7484 (Medium Blue) is the closest cross-brand match to Isacord 3631, with a perceptual color distance of ΔE 2.05.
Is Isacord 3631 good for production embroidery?
Yes. Isacord 40 is one of the major production embroidery thread lines used by promotional products distributors and embroiderers worldwide. Match against the customer's brand standards before committing to a job - the cross-brand alternatives above let you sub a closely-equivalent color from whichever line your shop has loaded.
Where can I match other PMS colors to Isacord threads?
Use the free Thread Color Matcher at /tools/thread-match - it converts any PMS code, hex, RGB, or color from an uploaded image into the closest thread across Madeira, Isacord, Robison-Anton, Coats, and Floriani. No account required.
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