They currently only have five colors
two are red, both of which aren't appealing (one is a silver/red.. yuck!)
one is a black which I'm not interested in (I hate black)
one is a purple but in real life it's mostly black
one is a pink which is also mostly black and not my color.
I just don't know what they were thinking with these balls while the Tzones have a lot of colors.
No offense but -
They were probably thinking something along the lines that
1. Many people do like this color set, and
2. They can't make a many variations in their strike balls as they do in their spare balls.
If you don't like red, or blue or black, then you have to consider yourself in the vast minority. Ball companies do a lot of research and especially in their lower resin strike ball lines and their spare ball line, they regularly discontinue certain colors and introduce many newer colors and color combinations.
Check on Ebay; they often have many discontinued balls. Maybe they'll have a color combination you will like.