Rosa 'Harlekin', (aka KORlupo), is a modern climbing rose cultivar, bred by Reimer Kordes in Germany in 1986.

It is considered to be the best of the bicolored modern climbing roses.

[1] 'Harlekin' is a tall, bushy climbing rose, 8 to 12 ft (250—365 cm) in height with a 3 to 4 ft (90—121 cm) spread.

Flowers have a high-centered, cupped form, are borne singly or in small clusters up to five, and are freely borne.

The plant is recommended for USDA zone 4b and warmer.