How to colorise a body of a note

macOS AppleScript
1

I can’t solve a seemingly simple problem:
I need to change the color of the note text leaving the first line unchanged

2

Just to clarify, is that a note in the Apple Notes app, with existing multiple lines of content?

3

exactly right
this is an existing note

4

This JXA code changes the color of the current note, but not the title, to red (#ff0000) but will break monospace text, URLs, embedded images, checklists and block quotes:

color_ = '#ff0000'
note_ = Application('Notes').selection()[0]
note_.body = note_.body().replace(/(?<=[\s\S]<(?:li|div)>)[^<].*?(?=<\/(?:li|div)>)/g, `<font color="${color_}">$&</font>`)

Not breaking these seems very difficult…

5

Thank you so much
I spotted an interesting thing, everything is good and well with Mac, but it looks different on iPadOS