A nice long sleeve purple shirt with two breast pockets.
Here's something very similar but pricey, buy loose as its quite fitted:
DSQUARED2 Long Sleeve Shirt in Maroon from Yoox US$161.15
Something pretty in the same vein:
Fossil's Ellen Woven in Dark Purple US$58
Without pockets but modest:
Al Farah's Cotton Spandex Blouse in Burgundy US$19.99 also try plum.
Have a look at Primo Moda's range of shirts with pockets but none purple