A buddy found this insulator and I think it is the color that those with an interest in color names call Hemi blue. Having only found aquas in the wild I am not sure. The next picture shows it next to an aqua Hemi 42 for color reference. Update: The GOM, Mr Kim, Don Briel, Mr Hemingray himself Bob Stahr, and Texas Dustin by way of San Fran all agreed this is Hemi Blue. Nice to have one on my windowsill after all these years. Just love the 154's, nice compromise between size and shape to get great color in sunlight. Thanks to everyone.