Online Flutter-developer conference logo

This is what Full Stack Flutter was looking for in their logo design

We need a logotype for a conference call "Full Stack Flutter". It's an onlie conference for Flutter developers around the world. The logo must work both on a dark and a light background (possibly in two different versions).

It would be cool if the logo made some sort of reference to the "Flutter" logo, but we cannot use it directly as it is a Google brand. It could also include a stack (e.g., stack of paper) as the conference is for full-stack developers. Would prefer a modern feel, rounded corners. Colors in blue, turquoise, and purple.

If you have another idea, feel free to think outside the box!

Please see image for references to old logo, Flutter logo, and colors. Read more