Thread color conversion
The Isacord 40 and Candle Thread polyester numbers that stand in for Madeira Polyneon 1684, from Amann's and Candle Thread's own conversion charts.
| Brand | Number | Color |
|---|---|---|
| Madeira Polyneon 40 | 1684 | Spool color not measured |
| Isacord 40 | 0643 | No published name |
| Candle Thread polyester | 8660 | Candle sells by number, no name |
The Isacord pairing is Amann USA's official Madeira Polyneon to Isacord cross-reference. The Candle Thread pairing is the conversion sheet Candle Thread USA sent on August 26, 2026, and the Candle color dot is the value from their own master shade card. Madeira's spool color for this number has not been measured off their photograph yet, so no Madeira dot is shown rather than a guessed one. Search the whole charts in either direction on the Polyneon to Isacord converter and the Madeira to Candle Thread converter.
Amann's own Madeira Polyneon to Isacord chart lists Isacord 0643 for Polyneon 1684. Some pairings on that chart are exact and the rest are the nearest available color, so a test stitch is the final word.
Candle Thread USA's own conversion chart lists Candle 8660 for Polyneon 1684, and marks it their top match grade. That is the maker's claim about their own thread, not an independent measurement.
No. Screens are backlit and dye lots move a little between runs. The dots here are for recognizing a color, not approving one. For a logo color, or anything a customer will hold against a brand guide, stitch a test and look at it in daylight.