Hi and welcome to Knitting Help.
It's a combination of wandering or snake cables. Instead of crossing the cable knit stitches, you move the 2 knit stitches over the background knit stitches. There's purl stitches between half the cables. I couldn't find the exact pattern but these patterns show you the idea of the wandering cable. You could set up several next to each other for the scarf.
Were you thinking of stripes for your pink and blue scarf or something else? Any particular weight yarn?