A tunic top or dress with matching fabric on the collar belt and cuffs can often be seen in First World War photographs.
The fabric used was often patterned but sometimes plain. I imagine it would have been contrasting and probably colourful.
There are variations where one of the three, usually the cuffs or belt are left plain.

Some munitions workers wore similar clothing but the passage of time has obscured whether fashion was influenced by working dress or the other way round.

Above photo dated 1915: Age about 17 years old  • Estimate: born 1998 ± 3 years

Inscribed :...from Cis. Xmas 1915