Laserschwert said:

Yes, Harmy's colors are slightly more saturated. But we shouldn't forget that he got an actual film source as color reference, whereas we only have analogue transfers (VHS and LD) for the international versions. So I'd say his colors are probably the real deal.

That's sure for the original version. But for the international versions, who knows ? For me the text "il y a bien longtemps" was always in light blue.

Anyway a choice must be done and because you friendly make the french crawl you can chose the colors you find the best.