backGroundColor doesn't work

[frumentum]

At first thanks a lot for this amazing package. library("r2excel") filename <- "r2excel-example1.xlsx" wb <- createWorkbook(type="xlsx") sheet <- createSheet(wb, sheetName = "example1") xlsx.addHeader(wb, sheet, "Add paragraph", level=2) paragraph="Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged." xlsx.addParagraph(wb, sheet, paragraph, fontSize=14, isItalic=TRUE, fontColor="darkred", backGroundColor="gray") saveWorkbook(wb, filename)

bachGroundColor doesn't work. Maybe this information is necessary: I'm running on linux mint 18 and use libreoffice.