I think the most common color is red and black, but im pretty sure you can get them in any color you want.
Asp.
An asp is a type of snake. A boa is also one.
asp
Asp.
a bite from a small viper, that has deadly venom
Western whip snake, Asp viper, Italian Aesculapian Snake, Orsini's viper, Meadow viper
An asp is one of various types of snake, a water snake, a viper, or the European cobra.
it is white
Consider the Adder, commonly called the: Death Adder(Acanthophis antarcticus), Australian Brown Snake(Pseudonaja textilis), Asp viper, (Vipera aspis zinnikeri).
In Umbria, Italy, the most venomous snakes are the European adder (Vipera berus) and the nose-horned viper (Vipera ammodytes). Both species have venom that can be harmful to humans and caution should be taken when encountering them in the wild.
There are several venomous snakes in Saudi Arabia that can cause human fatalities. Arabian cobra, desert black snake, Horned viper, Sindh sawscale viper, Northeast African sawscale viper, Carpet viper, Anderson's burrowing asp, Ein Geddi burrowing asp and Puff adders to name but a few. There are also around 9 species of sea snake off Eastern Saudi, all of which can produce a potentially fatal bite. Snakebite isn't a major hazard but you shouldn't be naive to what species are around. The previous contributer was a little off the mark.
An asp viper's diet consists of rodents such as mice, lizards and small birds. The asp lies still waiting for the prey to enter its territory, then strikes at the prey, using its venom to poison it.