Sorry. Original question was about the W124 chassis and Cream vs Parchment. Your quesiton is very different as the color change occured in the 1990's, well after W123 production ceased. You might want to post a new/separate thread for your W123 color question.

I can tell you that for the W123, code xx4 was Palomino. The term "Java" was not used until at least the late 1990's. Remember that we are discussing FACTORY terms for color codes, not aftermarket! Aftermarket vendors (for dye, leather, carpet, Tex, etc) often use different/incorrect names. Don't trust anything you see on aftermarket sites. Also keep in mind that colors fade drastically after 30+ years in the sun and Palomino is famous for uneven fading, which is why it's often referred to as "pinkomino"...