error: '_red' was not declared in this scope (LIBRARY)

[DirkvanderBurgt]

vaj4088:
Do you see an important difference between these two functions?

int Color::getBlueValue()

{
  return _blue;
}

void setBlueValue(int value)
{
  _blue = value;
}

Yes I do now (facepalm). I can't believe I didn't see that. Thank you