code: @ScalarFunction
      @SqlType(ColorType.NAME)
      public static long color(
              @SqlType(StandardTypes.DOUBLE) double value,
              @SqlType(StandardTypes.DOUBLE) double low,
              @SqlType(StandardTypes.DOUBLE) double high,
              @SqlType(ColorType.NAME) long lowColor,
              @SqlType(ColorType.NAME) long highColor)
      {
          return color((value - low) * 1.0 / (high - low), lowColor, highColor);
      }
docs: Interpolate a color between lowColor and highColor based the provided value
  <p/>
  The value is truncated to the range [low, high] if it's outside.
  Color must be a valid rgb value of the form #rgb