My apologies a DOLOS a concretblock used in breakwaters and harbours in the shape of an H with a twist. We see lots of these at the harbour in Port Elizabeth, South Africa.
But I have sneaking suspicion you know this and are yanking my chain, LOL
#194. Make Harbor color blue like lightest blue in #110. Try using black/gold colors for the icon. Thank you. P.S. I didn't know what a DOLOS was. Very cool idea you have here.