您可以使用“自定义表容器”（请参见此处：https://rstudio.github.io/DT/）和一些JS（jQuery）来修改表CSS样式。

# a custom table container
sketch = htmltools::withTags(table(
  class = 'display',thead(
# Define the grouping of your df
    tr(
      th(colspan = 4,'Historical'),th(colspan = 4,'Current')
    ),# Repeat column names 8 times
    tr(
      lapply(paste0("Col ",1:8),th)
    )
  )
))
# Using JS for adding CSS,i.e.,coloring your heading
# Get the corresponding table header (th) from a table cell (td) and apply color to it
headjs <- "function(thead) {
  $(thead).closest('thead').find('th').eq(0).css('background-color','#D9E1F2');
   $(thead).closest('thead').find('th').eq(1).css('background-color','#8EA9DB');

}"

# Your data frame
df <- data.frame(1,2,3,4,5,6,7,8)

# Output DT with your custom header
datatable(df,container = sketch,options = list(
  headerCallback = JS(headjs)
))

输出：