Hehe Rayyan looks a bit grumpy in this image! She's wearing a simple purple georgette square hijab with a white underscarf in with this outfit, its so simple and pretty. You could wear any hijab with this outfit as this other clothing items are neutrals.
Star Scarves' Light Purple with Sequins Pashmina Scarf for USD $14.39
Al Hannah's Solid Turkish Gauze Hijab US$9.99 in Violet
The Hijab Shop's Square Hijab in Purple £5.25
I personally have a scarf very similar to Rayyan's from eJilbab, a Georgette Hijab in Thistle US$5.99