Your first logbook no one will care at all whatsoever. I used to always write FIRST SOLO in huge letters in the comments block when my students soloed, it was a huge day and will always be a huge day. As for the blue pen I have seen logbooks where the first 100 hours alternate between blue pen, black pen, felt tip, gel ink pencil and yes even colored pencil. You know what you want your logbook to look like now and thats great. The only reason one would ever care is because it is an attention to detail issue and thats all. My handwriting is terrible and my logbook shows it but am I going to hire someone to make my entries for me in impeccable penmanship? NO.
You are fine, move on, no one cares.