Hi @JustAstudent, try with this, and remember put in other occasion the example data, dput() form make reproducible example.
The colors is well like said @denfly .
ggplot(data = class_survey, aes(x = coding_exp_words, fill = coding_exp_words)) +
geom_bar(stat="identity", position="dodge") +
scale_fill_manual(values = c( "red", "blue", "purple", "green", "black", "cyan")) +
theme(axis.ticks.x = element_blank(),
axis.text.x = element_blank())