I got my Blue Cobra pair and right now they are a light blue and not much Cobra, but its the most awesome blue.  Its a bit like sky blue that is the male, and the female reminds me of my Sassy (RIP).
The male kinda looks like this one.
http://www.asiatropicalfish.com/products/Fish/Blue-Glass-Platinum.gif

2 Pair Lyetail and man I can't even start to tell you about the males.  The females look like reg. guppies but with light yellow and red tails, kinda like a yellow cobra.  The males, I have a red one, the coloring on him makes him look like he is on fire so I have named him fire, the other is ice blue with a few red specks in there so I have named him Ice. This picture will kinda help you see how the tails look on my males.
http://www.guppiesonli.com/guppyimages/articles/tail/Lyretail2.jpg

2 Pair Silver Streak Flamingo, They look like reg. guppies but they are VERY shinny, they look like they have a silver coat on them and they have yellow in them.  

My Endlers should be here today.  If not I am not going to be mad.  They shipped it yesterday.