Dark Aqua is the same color across all my different zipper gauges & types.
This is the lightest weight of invisible zipper and not very strong.
The longer lengths (26", 30" 36") of #2 invisible zippers will be discontinued by the end of 2020. Instead, #4 invisible lengths will be expanded. #4's are stronger & better for pillows, costuming, and bridal.
This particular size (2mm across the closed coil) will fit in the old plastic invisible zipper foot or most feet available for your sewing machines. If you don't have an invisible zipper foot, use your regular zipper foot & stitch in the ditch.