Albino = total lack of melanin
Hypomelanistic = reduced levels of melanin (to various degrees)
Hypermelanistic = increased levels of melanin (to various degrees)
All these traits effect the melanin layer of coloring on snake, thus an albino is not necessarily an all white snake. There are other pigments responsible for the various patterns on snakes. Most albino snakes that normally have patterns are the classic white with yellow patterning. If a snake normally has no pattern, it just depends on what pigments are responsible for their normal color.