…of the Regency fashion era (1790 to 1825 ish) was of un-dyed and unadorned white cotton.
The waist rose from where it had been in the previous Georgian/Colonial period at the natural waist line – up, up, up – to just under the bust. This was called “Empire Waistline” in reference to the french queen who started the trend.
(sketches: the basic Regency dress was of plain white cotton with short sleeves. Later additions were sleeves and printed cotton)