Is That Blue Enough?

Hello,
Navy, Baby, Sky, Munsell... What do these words all have in common? Blue! These are all different shades of blue. So, today's word is a adjective describing a type of blue. It is:
caesious. Hmmm, what does that mean?

Meaning:
Having a bluish-grey* colour**.
In a sentence:
Hmmm; the sky is rather caesious today.
My Thoughts:
If caesious is bluish-grey, then what is greenish-grey?

If your're wondering what the '*' and '**' mean, look below.
Jeffrey signing off...

P.S
* The word, grey, is the British/Commonwealth spelling of the American word, gray.
** The word, colour, is the British/Commonwealth spelling of the American word, color.