The colors are.. odd.. they need to be updated to look better on the Mojang background.
However, Honestly I think that someone should come along and make a function to render strings with an outline.
Because white text, with black outline looks great on all colors.
But ya, as Dies said, as it sits the new early loading screen is a complete re-write, so it doesn't have the splash.properties that used to exist.
Feel free to work on making it better.