Color can range from navy blue with bright orange highlights, to lime green to lemon yellow, and anything in between depending on mood. Great for unique color and personality. Don't keep with blue eyes as it will tend to bully them. (had to get rid of mine because of this)
I have a school of about 5-6 in my 125g. These are really cool and their color shows best with a dark background, substrate and a lot of lush green plant growth. Always busy swimming back and forth around mid-tank level. Mine love a diet of frozen bloodworms, live blackworms, flake and crumble. Really interesting to watch the males "flash" to attract a mate. Have to see it to believe it.
I have four of these guys in with a school of assorted rainbows and they are awesome. Some sources claim they don't break the 5" mark like some of the other large rainbows, which is attractive if you have limited space. Love live blackworms, in fact, one would not start eating dry foods until I started mixing in live food.