The Dutch word for purple is
purper

Dutch Definition

purple
1. paars, purper

paars
1. adj. purple
Ze heeft een paarse blouse in haar kast hangen. - She has a purple blouse hanging in her closet.
Lavendelbloemen zijn meestal paars. - Lavender flowers are usually purple.
De lucht kleurde paars tijdens de zonsondergang. - The sky turned purple during the sunset.
2. adj. (politics, Netherlands, Belgium) relating to cooperation between liberals and social democrats of the third way
3. adj. (politics, Suriname) relating to the National Democratic Party
4. n-n. The colour purple.
5. n-n. (politics, Netherlands, Belgium) A coalition of third way social democrats and liberals.
6. n-n. (politics, Suriname) the National Democratic Party

purper	©
1. n-n. purple, especially a reddish hue of purple (colour)
2. n-n. (historical, with definite article) The purple, imperial or royal power, in particular in relation to the Roman Empire
De legeraanvoerder liet zijn zoon het purper aannemen. - The military commander let his son adopt the purple.
3. adj. (chiefly Belgium) purple
4. adj. (Netherlands) reddish purple