How to change the color one bar in a bar chart?

[LuisAhumadaUSA]

I am working on several bar charts that look like the ones I am pasting below:

I would like to change the color of the first bar in each graph. How can I accomplish this?

[BeanFactory]

A few questions for you: are the bars you want to change separate objects, or are they grouped together? Are the parts you want to change all the same color, or are they slightly different?

[Kurt Gold · Accepted solution]

Is that a "live" chart in Illustrator (created by one of the Chart tools)?

Then just direct select (White pointer) the parts that are going to be recoloured and apply the desired colours (ideally, apply a graphic style that implies the fill colour).