Related issue, but I recall someone else here at BF had a similar problem. Yellow is not always yellow. The Jagwire "yellow" is a bright, pure yellow. I ordered handlebar tape of a brand I've used before and the yellow was more like chartreuse, a horrible mis-match. Back it went and I got Cinelli, their yellow is a good match.
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Larry:1958 Drysdale, 1961 Gitane Gran Sport, 1974 Zeus track, 1988 Masi Gran Corsa, 1974 Falcon, 1980 Palo Alto, 198? Vitus 979. Susan: 1976 Windsor Profesional.