Correct — with a slightly superhero-cartoon register.

What a Japanese person actually thinks
Reads a bit like a children's tokusatsu show, where the hero shouts about 正義 before transforming. Sincere but a little four-colour.

Meaning

Literally: correct + righteousness
Actually: Justice, righteousness.

Scores

Naturalness●●●●●

Common word.

Coolness●●●●●

Fine characters. 正義の味方 ('ally of justice') is such a stock phrase that the word is hard to hear straight.

Watch out

Nothing embarrassing lurking in here.

Get this instead

義 gi
righteousness

Drop the 正 and it stops being a cartoon and becomes a bushidō virtue. Same idea, much better register.

On skin

正義

Orientation: vertical

Mincho.