DMC 797 to Cosmo: Thread Conversion

Cosmo 135 is a close match for DMC 797 Royal Blue. The lack of significant undertone variation in a pure royal blue makes it one of the more forgiving colors to substitute across brands, and Cosmo 135 captures the essential character adequately. For blackwork designs where 797 substitutes for black thread — creating bold blue line work rather than the usual black — Cosmo's slightly silkier finish may produce a slightly shinier line quality, which could be an attractive visual difference in the finished piece.