Believe it or not, there are several delicious foods that are naturally blue. Besides blueberries and purple grapes. Add these foods to your table to help ensure a well-balanced diet.

Swipe through to learn about 7 interesting blue foods.

There are several types of blue squash and pumpkins. While the outside is blue or bluish, the insides of these gourds are the color of regular squash. Blue squash have the same health benefits of regular squash — they’re high in beta-carotene and vitamin A, and a good source of fiber.

Photography: Amazon

In Iran, you’ll find blue salt, one of the oldest salts on the planet. It is extracted from ponds that formed more than 100 million years ago. The blue color comes from a mineral called sylvinite.

Also known as indigo carrots, blue carrots taste like orange carrots and offer similar health benefits.They’re rich in anthocyanins, which are strong antioxidants. Researchers also link blue carrots with better immune response.

Photography: Pinterest/Flickr

Blue algae, also known as spirulina, is a powered amino acid supplement that is derived from seaweed. High in protein, healthy fats and B vitamins, many people use this powder in smoothies.

Photography: Pinterest/YouEatPlants.com

We’ve all seen red tomatoes and green tomatoes, but have you ever seen a blue tomato? They exist! Their skin is blue but the inside is red like a regular tomato, and they taste like regular red tomatoes, too.

Photography: Etsy/SeedCult

You probably won’t find blue broccoli at the grocery store, but you can find seeds online to grow it yourself. It’s pretty much like regular broccoli but it’s blue. Maybe your kids will be more likely to eat it?

Photography: Etsy/Backyardsounds

Blue olives are native to Sri Lanka. They’re a gorgeous, bright blue on the outside, but green on the inside. These slightly sour olives are a popular ingredient in Sri Lankan home cooking and street food for both savory and sweet dishes.

Photography: Flickr/Michael Coghlan