I got weights in grams (!) for two rod series. I believe, Blue is about same weight as Greenline, Black is just some grams lighter, and Yellow just some grams heavier than Blue - but I´m not 100% on this.
I think you can do straight conversion to grains with Google, try "grams to grains".
Grey 13´/ 9 and 14´/ 9 seem to be almost same weight - maybe there is bigger difference in cork-handle´s weight (in 14-footer handle is longer in both Blues and Greys).
Rod lenght line rodweight
Loop Blue 11,´6´´ 8 175 grams
Loop Blue 12´4´´ 8 185 grams
Loop Blue 13´2´´ 9 215 grams
Loop Blue 14´ 9 240 grams
Loop Blue 15´ 10 285 grams
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