There’s a downside to all the rainbow bagels, coffee, and sushi filling up our Instagram streams. They’re full of food colouring. And probably aren't that healthy for you. Thankfully there are already loads of food that’s naturally rainbow coloured out there. We’re talking bright green avocado, pops of strawberry red, zingy orange carrots, and pink watermelons. Here are some clean, easy to make rainbow salads and snack ideas, perfect for a summer party.