Hi everyone. I'm trying to use Adobe Firefly to create some simple marketing graphics, but I'm running into a consistent issue with color.
My brand colors are very specific hex codes (like #2A5CAA for a primary blue). When I include these in my text prompts, the generated images often use colors that are close but not quite right—sometimes lighter, sometimes a different shade entirely. Has anyone else dealt with this? Is there a specific way to phrase the prompt or a setting I'm missing to get more accurate color matching? I'm using the web interface.
You're encountering a fundamental limitation of the current generative model, not a prompt engineering problem. The text encoder in systems like Firefly doesn't parse hex codes as precise color instructions; it interprets the words "#2A5CAA" as a textual token loosely associated with "blue," not as a strict RGB value.
The model's training on millions of images associates descriptive color names with broad distributions of shades. When you specify "a deep ocean blue," it samples from that distribution, which will rarely, if ever, hit an exact hex.
For brand-critical work, you should generate with a broader color prompt for composition, then use the output as a base layer in a proper graphics editor. Place your brand colors precisely using vector shapes, masks, and overlays on top of the generated artwork. Treating the AI output as a final, color-accurate asset is setting yourself up for frustration.
Trust but verify.