Can you use ανοιχτο even before μπλε to say "light blue", for instance?
Yes, before any color actually.
Well, except for black and white, I guess. xD
Thank you. Very helpful! Excellent question and first-rate answers. (2018/07/04)
Both "light orange" and "bright orange" seem to be accepted as qualifiers, but these are not synonyms (in my view). Light orange refers to pale orange, whereas bright orange refers to intense orange...
Why not ανοιχτή πορτοκαλί to make it feminine? If it were green we'd say η φούστα είναι πράσινη right?
Because 'πορτοκαλί' cannot be inflected, so it is considered neuter, I guess.
Well, that's kind of the reason why. That, and the force of habit. :P
Does ανοιχτο resembles the greek verb for "to open'?
Yes. ανοιχτός basically means "open" as in "the door is open" or "the bird flew in through the open window".
So Greek calls pale colours "open" rather than "light, bright, pale".