Coturnix quail? If so, the ideal ratio is one male to five females. If you try to keep them in pairs, you will likely end up with an over mated hen. At best, this will mean a bald hen. At worst, you'll have a scalped and dead one.
Another thing about keeping them indoors is that they...
These are all coturnix. If they are celadon, you won't know until they start laying because celadons lay the pale blue eggs. They can come in any colour.
I have labeled these three different coloured ones.