that depends on the kind of ataxia you have.
fyi: ataxia is a neuromuscular condition in which patients have difficulty controlling their movements. some forms are progressive and degenerative (meaning it only gets worse with time) or chronic. degree of severity can vary.
People with degenerative ataxia have shorter life expectancies. If this is a concern for you, then yes, it can affect your parenting if you were to die really early.
Some forms of ataxia are hereditary. In this case, you would be reffered to a genetic counselor who would help you weigh out the risks of having children and help you discuss your option.
Is your ataxia severe? Are you physically capable of independent living? These are valid things to consider when considering your ability to raise children.
Ataxia probably will not complicate aspects of parenting such as your ability to conceive, but some problems with voluntary movement can complicate delivery (though thanks to Caesarian Section, delivery is possible for people in such a situation).
Color is for crayons, not for people.