R + ggplot2,150 bytes - https://cran.r-project.org/web/packages/ggplot2/index.html

library(ggplot2);ggplot(data.frame(y=1:6),aes(y=y))+theme_void()+geom_bar(fill=c("#9400D3","#0000F[![enter image description here][1]][1]F","#006400","#FFFF00","#FFA500","#FF0000"),width=1) 

the output image [1]: https://i.sstatic.net/LCJCU.png