What is another word for periwinkle?

There are a few words that can be used to describe periwinkle, depending on the specific context:

For the color:

* Lavender

* Lilac

* Pale blue

* Violet blue

For the plant:

* Vinca (the genus name)

* Creeping myrtle

* Myrtle

* Periwinkle vine

For the sea snail:

* Whelk (a broader term for a type of sea snail)

* Common periwinkle

* Littorina littorea (the scientific name)

The best alternative word will depend on the specific meaning you want to convey.