Another question related to box-percentile plot, bpplot(): How to color the "box" or middle half of the data

Dear List,

A follow-up question related to bpplot() of the Hmisc package: How does
one
color the "box" , or the middle half of the data, of a box-percentile
plot?
bpplot(... , col="lightgray") apparently does not work, though
boxplot(...
, col="lightgray") works.

With much appreciation,

platform i386-pc-mingw32
arch     i386
os       mingw32
system   i386, mingw32
status
major    2
minor    1.0
year     2005
month    04
day      18
language R