Here's why:
* Ancient Greeks didn't have a distinct concept of blue: Their color vocabulary was limited compared to ours. They often used terms for "dark," "dark grey," "sea-green," and "sky-colored" to describe what we would call blue.
* Words with blue connotations:
* κυανός (kyanos): This word was often used for a deep, dark blue color, especially of the sea or sky.
* πόρφυρος (porphyros): This originally referred to purple but could also encompass shades of dark blue.
* γλαυκός (glaukos): This word described a greenish-blue hue, often used for the sea or eyes.
Ultimately, the specific shade of "blue" would be implied by the context and the object being described, rather than a single dedicated word.