Unity Low Poly Water URP
Created Unity Version : Unity 2019.3.10f1 Universal RP : 7.3.1
Select "LowPolyWater" Material, Settings->Edit Shader. Show URP ShaderGraph, Property Name is "WaterColor". WaterColor is Gradient and HDR Color.
LowPolyShader, "BorderFoamColor" changes the color of the foam. This is mixed with the water color "Maximun" Node, so if you don't like it, change it.