Firefly does not generated my promt.

Hi. I tried to create a prism glass snowflake. I writed promt correctly and I created reference image. However, my whole attempts failed. All the firefly ai image that generated was a blue snowflake. I dont understand. I watched tutorials, I did what they did step by step but didn't worked. It just gave me a blue snowflakes even I writed "no blue" in promt section. Some created images could worked but they were not transparent at all. Why my all attempts failed?

Here is my promt:

"a snowflake made of prism glass, transparent, no blue, isolated on black background"

Reference and composition image:

This  image could worked but still not transparent:

Here is the picture that I want what my ai work looks like: