No, pea milk is yellow peas. Yellow peas are like green peas but they are yellow instead of green.
Really honest, no kidding, I know this Q&A might sound like joking or trolling but it is completely and absolutely true.
Pea milk is made from peas the same way almond milk is made from almonds and oat milk is made from oats. It is the ripe dried yellow peas that get ground in water to make it. Pea milk is about the same colour as almond milk.