# FLUX Image Best Practices — prompt skill for prompts by model

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Prompt FLUX image models well: structure, JSON prompts, hex colors, typography and multi-reference edits.

- **Type:** [Prompt](https://skills.varg.ai/prompts.md) · [Prompts by model](https://skills.varg.ai/browse/skills/prompting.md)
- **Slug:** `flux-image-best-practices`
- **Status:** live
- **Publisher:** Black Forest Labs (vendor, verified)
- **License:** MIT
- **Source:** https://github.com/black-forest-labs/skills/tree/master/skills/flux-image-best-practices
- **Works in:** Claude Code, Codex, Cursor, Gemini CLI
- **Requires:** BFL API key (BFL_API_KEY)
- **Cost:** Billed by Black Forest Labs (API credits)
- **Adoption:** 332 installs, 135 GitHub stars (skills.sh, 2026-10-26)

## What it does

Prompting rules for BFL's FLUX image models across the FLUX.2 and FLUX.1 families, starting from a prompt-structure formula and model selection. Rule files cover text-to-image and image-to-image prompting, structured JSON prompts, hex-color control, typography, multi-reference editing and alternatives to negative prompts.

## Use when

- Writing prompts for FLUX
- Exact brand colors or legible text in an image
- Editing with several reference images

## Install

- Claude Code: `/plugin marketplace add black-forest-labs/skills && /plugin install flux-image-best-practices@black-forest-labs`
- Codex: `npx skills add black-forest-labs/skills --skill flux-image-best-practices -a codex`
- Cursor: `npx skills add black-forest-labs/skills --skill flux-image-best-practices -a cursor`
- Gemini CLI: `npx skills add black-forest-labs/skills --skill flux-image-best-practices -a gemini-cli`

**Models it drives:** flux-2, flux-1

## Example output

https://skills.varg.ai/previews/flux-image-best-practices.webp — FLUX typography example from BFL's 'Typography & design' prompting guide: a retro hand-lettered poster reading 'If you love me let me sleep' (credit: Black Forest Labs, https://docs.bfl.ai/guides/usecases_t2i_typography_design)

## More prompts by model skills

- [fal Prompting](https://skills.varg.ai/skills/fal-prompting.md): Prompt specific model families well: Kling, GPT Image 2 and Happy Horse guides, loaded only when needed.
- [Replicate Prompt Images](https://skills.varg.ai/skills/replicate-prompt-images.md): Write better image prompts and edits: photographic language, lighting, text rendering, consistent characters.
- [Replicate Prompt Videos](https://skills.varg.ai/skills/replicate-prompt-videos.md): Prompt video models like a director: shots, camera motion, four audio layers, dialogue, time-coded beats.
- [Video Prompting Guide](https://skills.varg.ai/skills/inference-sh-video-prompting-guide.md): Write prompts that video models follow: shot types, camera moves and per-model tips from Veo to Sora.
- [FLUX 3 Prompt Doctor](https://skills.varg.ai/skills/flux-3-prompt-doctor.md): Diagnose a FLUX 3 video brief before spending: resolve missing, conflicting or schema-changing asks.
- [AI Film Director (Visual Skills)](https://skills.varg.ai/skills/visual-skills-video-director.md): AI film director for video prompts: dramaturgy first (Murch, blocking, montage), then exact syntax per model.