Your boy is a blue bar all the way (regardless of his parents.) When you breed a red bar and a blue bar ambilobe, you can get either color or both for the offspring and sometimes even purple but it is a rare bar color. If you breed the same bar color together (red x red, blue x blue) the offspring are more likely to have the same bar color, but not always. TPM is right, you have a really nice yellow body blue bar so I would try to get another with similar colors. There aren't a whole lot of yellow body blue bars with clean blue bars around.