Greenish-blue and Greenish blue

Greenish blue and greenish-blue are semantically related In some cases you can replace phrase "Greenish blue" with "Greenish-blue", this phrases are similar.

Greenish blue noun - A shade of blue tinged with green.

Greenish-blue and greenish blue are semantically related in aqua topic. Sometimes you can use "Greenish-blue" instead the phrase "Greenish blue" as a noun or an adjective, if it concerns topics such as emerald in color.