I am learning how to use R Studio. I created Bar chart, Box plot, and Histogram$$that are colorless $.$ I want to learn more about making colored bar charts, box plots, and histograms. I used the following codes$/$functions to create them.

For Bar charts.

barplot$($table$($urmc$$$Job titles$),$ main $=$Barplot$,$xlab $=$Categories$,$ ylab $=$Frequency$)$

For Box plot

Boxplot$($urmc$$$Hourly rate$,$ main $=$Box Plot$,$ ylab $=$Values

For histogram

Hist$($urmc$$$Typical Hours$,$ main $=$Histogaram$,$ xlab $=$Values$,$ breaks $=10$

How can I make them coloured?