This most recent pic is pretty cool for a couple reasons, among them: The larger plant in the middle (and the one to the right in the foreground) is an example of a plant that I repotted in the brief pause after it had fully opened but before it started growing its first fascicle. The smaller plants (mostly out of focus) show individuals left to grow their first fascicles before repotting. Notice how much bigger the other 2 are at the same age!

Here is mine: I thought of Atlantis because the leaves have a bit of a twist at the tips.

This may come too late for your project, but neither of the blues in your photos match Farrow & Ball colors, at least on my screen. For reference, I have a full color collection card to which I compared. Blue Ground for the first and Cook's Blue for the second are probably the closest but are not matches. If you are sure these are Farrow & Ball colors, then you would need to check for archived colors unless the online images are somehow color distorted.

Sure looks like a Bird of Paradise to me, as is its common name here in the US, so you were on the right track. Here's some info: https://www.thesill.com/blog/how-to-care-for-bird-of-paradise