Flux 2 Flex: Precision Text-to-Image for Designers

blackforestlabs/flux-2/flex/text-to-image

Generate design-ready visuals with hex-code color precision and structured prompts. Built for professionals who need exact palette control and layout fidelity from text alone.

Prompt *

High-resolution iPhone photograph tightly composed to capture two fashionable women standing mid-distance from a pristine white gallery wall adorned with a large whimsical modern artwork. The scene shows a candid moment mid-discussion, their relaxed postures conveying natural engagement with the art and each other. One woman, seen from a slight side angle at three-quarter rear view, wears a dark gray corset-style top paired with relaxed black jeans that gently crease at the ankle, her arms loosely at her sides. Her hair, softly catching the ambient light, frames her face as she directs her gaze thoughtfully toward the painting. The other woman, captured from behind and slightly to the side, dons a sleek black dress with subtle texture, complemented by a delicate gingham ribbon tied neatly in her hair, which cascades softly over her shoulders. Her hands rest casually by her sides as she leans slightly forward, visibly engaged in the conversation. Soft, diffuse ambient gallery lighting gently sculpts fabric textures—the corset's structured sheen and the dress's smooth flow—while creating a natural compression between figure and whimsical artwork. The expansive white wall behind them provides a clean, graphic background, establishing a calm horizontal rhythm that anchors this intimate, fashion-forward moment of contemporary art appreciation within a serene minimalist museum setting.

Image Size

The size of the generated image. For custom image sizes, you can pass an object with width and height.

Output Format

The format of the generated image.

Guidance Scale

The guidance scale to use for the generation.

Seed

Number of Inference Steps

The number of inference steps to perform.

Magic Prompt

Whether to expand the prompt using the model's own knowledge.

Idle

The rate is $0.06 per image.

Introduction to Flux 2 Flex Text to Image

Flux 2 Flex Text to Image is the precision-engineered creation engine, designed specifically for designers who need exact control over their generated assets. Unlike standard models, Flex introduces native support for Hex Color Codes (e.g., #FF5733) and structured JSON-like prompts, allowing you to dictate the exact palette, composition, and layout of your image from scratch. It is the ideal tool for brand consistency, UI asset generation, and creating marketing visuals that must adhere to strict style guides.

Flux 2 Flex on X: Creator Highlights and Insights

Key Capabilities

Hex Color Precision: Uniquely capable of understanding specific Hex codes in the prompt (e.g., "a circle in #0055FF"), ensuring your brand colors are rendered accurately.
Structured Composition: Excel at following complex, multi-part prompts describing specific layouts, making it perfect for generating poster backgrounds or UI elements.
High-Fidelity Typography: Renders crisp, legible text and logos when described in quotes, ideal for mockups and signage.
Clean Asset Generation: Optimized to produce clean, artifact-free subjects on solid or transparent-style backgrounds for easy masking.

How to use Flux 2 Flex Text to Image

Define Palette: Use specific color names or Hex codes in your prompt to lock in your brand identity.
Describe Layout: Be explicit about where elements should be (e.g., "in the top right corner", "centered").
Set Ratio: Choose Image Size based on your output medium (e.g., portrait_16_9 for stories).
Tune Flexibility:

- Guidance Scale 2.5 - 3.5: Good balance of creativity and instruction following.

- Guidance Scale 4.5+: Strict adherence to your color codes and layout instructions.

Example Prompts

Brand Asset: "A minimalist 3D cube floating in the center, matte finish in #FF4500 orange, soft shadows, white background, high resolution."
UI Mockup: "A mobile app login screen design, clean interface, primary button color #4A90E2, text 'Welcome Back' in sans-serif font."
Marketing Poster: "A surreal landscape with purple (#800080) mountains and a neon green (#00FF00) sun, retro synthwave style, vertical layout."

Pro Tips

Magic Prompt: Keep enable_prompt_expansion ON for general ideas, but turn it OFF if you are providing specific Hex codes to prevent the model from overriding your specific colors with generic "vibrant colors" descriptions.
Aspect Ratio: Match the Image Size to your intended use case to avoid cropping important design elements.

Related Tools

To edit or recolor an existing image instead of creating one, use Flux 2 Flex Image to Image.

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Frequently Asked Questions

What is Flux 2 Flex and how does its text-to-image feature work?

Flux 2 Flex is an advanced text-to-image model developed by Black Forest Labs. It allows users to generate professional-quality images from descriptive text prompts, supporting flexible control over style, lighting, and layout.

How is Flux 2 Flex different from earlier Flux versions in text-to-image generation?

Flux 2 Flex improves upon earlier variants by enhancing photorealism, prompt adherence, and typography accuracy in text-to-image outputs, plus it allows up to ten reference images for style or identity consistency.

Is Flux 2 Flex free to use for text-to-image projects?

Flux 2 Flex offers free credits to new users for exploring text-to-image generation, after which use is based on a pay-as-you-go or subscription credit system through the Runcomfy AI playground.

Who are the main users of Flux 2 Flex text-to-image capabilities?

Flux 2 Flex text-to-image tools are best suited for creative professionals, designers, and marketing teams who need brand-accurate visuals, typography work, or consistent imagery across campaigns.

What are the supported inputs and outputs in Flux 2 Flex text-to-image generation?

Flux 2 Flex supports PNG or JPEG input files, outputs lossless PNG images up to 4 megapixels, and processes structured JSON text prompts for text-to-image control and reproducibility.

Does Flux 2 Flex text-to-image support the use of reference images?

Yes, Flux 2 Flex allows up to ten reference images to guide its text-to-image generation, allowing users to maintain character consistency, style transfer, or brand visual fidelity.

What makes Flux 2 Flex stand out among other text-to-image models?

Flux 2 Flex is recognized for its clean typography rendering, precise color matching with hex codes, controllable inference speed, and strong realism in text-to-image synthesis compared to competitors.

How do you access Flux 2 Flex text-to-image capabilities?

Flux 2 Flex can be accessed through the Runcomfy AI playground website, where users can log in, spend credits, and use a browser-based interface to create text-to-image outputs.

Are there any limitations to using Flux 2 Flex for text-to-image generation?

Flux 2 Flex can be slower than other variants due to its fidelity-oriented processing, and it’s optimized for images up to around 4 megapixels in text-to-image mode, which may limit ultra-high-resolution projects.

What kind of quality can be expected from Flux 2 Flex text-to-image results?

Flux 2 Flex delivers sharp, photorealistic images with strong color and detail accuracy, producing some of the most polished text-to-image renders available for professional use.

RunComfy

RunComfy is the premier ComfyUI platform, offering ComfyUI online environment and services, along with ComfyUI workflows featuring stunning visuals. RunComfy also provides AI Models, enabling artists to harness the latest AI tools to create incredible art.