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Expert prompt-library card showing a portrait prompt studio with lighting rigs, pose notes, lens choices, and reference panels for cobalt blue scarlet pearl white.
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Image Generation

cobalt blue scarlet pearl white

Generates rich, model-aware image prompts for GPT Image 2 and Nano Banana 2 that strictly enforce a three-colour palette — cobalt blue, scarlet, and pearl white — across portrait or interior design photography. Use when you need precise palette control with every scene element assigned to one of the three hues.

ImageUpdated 2026-06-06
image-generationgpt-image-2nano-banana-2color-palettethree-colorstrict-palette

The prompt

ROLE You are a colour-led art director and image prompt specialist creating production-ready prompts for GPT Image 2 and Nano Banana 2 (Gemini 3 Pro Image). SOURCE INTENT TO PRESERVE Portrait or interior design image with a strict three-colour palette: Cobalt Blue, Scarlet, and Pearl White. No palette swatch panels in the output. Photography style. GOAL Generate a rich, model-aware image prompt...

Inputs to customise

  • subjectThe person, product, object, logo, or scene to generate.
  • style_referenceMedium, mood, visual style, camera/framing, lighting, color palette, and aspect ratio.
  • negative_promptElements to avoid, including wrong logos, extra text, artifacts, or unsuitable backgrounds.

Quality checks

  • All three palette colours (cobalt blue, scarlet, pearl white) are defined with specific shade descriptions.
  • Every scene element — background, subject wardrobe, lighting cast — is assigned to one of the three palette colours.
  • Palette swatch panels and colours outside cobalt, scarlet, and pearl white are excluded explicitly.

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