Alcohol is produced by fermentation - the action of yeast on liquids containing sugars and starches.
Pure alcohol has no colour or taste.
Alcoholic drinks vary in colour and taste because of the ingredients used in them. Alcohol is a depressant drug and not a stimulant as many people think. It slows down the activity in the central nervous system including the brain. Depressants affect concentration and coordination, and slow the response time to unexpected situations. They feel more confident and often act in a more extroverted manner.