Hex codes and Pantone numbers are essentially useless in AI prompts. Models cannot read them. Color control requires descriptive language.
Why hex fails
AI training data almost never includes "#722F37 a glass of wine" labels. Models learn "dark red, wine red, deep maroon" as text descriptions. Hex codes simply do not register.
Descriptive palette syntax
narrow palette of deep warm crimson, faded ivory, and brushed bronze
- Lead with "narrow palette of" to lock the count
- 2–3 words per color: saturation + temperature + name
- Recommend 2–4 colors; 5+ tends to drift
Color vocabulary
| Axis | Words |
|---|---|
| Saturation | muted / saturated / faded / vibrant / desaturated |
| Temperature | warm / cool / neutral |
| Lightness | deep / pale / dusty / bright / dark |
| Analogies | wine, sand, jade, copper, slate |
Brand color reproduction
- Describe the brand color by analogy: "Tiffany Blue" → "pale robin egg blue with mint tint"
- Stack a brand-tuned style LoRA if available
- For exact match, correct in Photoshop after generation