Promptkoi

Geometric Shield Security Logo

Flux
By Varun Sharma Tested with Flux Flux.1 dev

Geometric Shield Security Logo is a tested Flux Flux.1 dev prompt for logo design work. It runs at Flux Flux.1 dev · Aspect ratio 1:1 · Steps 28 · CFG scale 3.5, and ships below with the exact prompt text, usage notes, and 2 pasteable variations.

Last tested: July 2026 with Flux Flux.1 dev

Part of the Flux prompt library.

Flat deep-navy security logo, a bold shield with a keyhole cut in negative space on white
Geometric Shield Security Logo — Flux Flux.1 dev, Aspect ratio 1:1

Prompt 

A minimal geometric security logo, one bold shield with clean symmetrical edges, a keyhole cut from the center as negative space, flat 2D vector, solid deep-navy mark on pure white, no gradients, no shadows, no text, scalable cybersecurity brand symbol

Settings

Model
Flux Flux.1 dev
Aspect ratio
1:1
Steps
28
CFG scale
3.5

How to use this prompt

The whole idea is the keyhole cut from the shield as negative space — phrase it that way ('keyhole cut from the center as negative space') or Flux floats a separate keyhole on top and the mark turns busy. Deep navy is the security-industry convention for trust and authority; swap to electric red and it reads alarm or error instead. Keep the shield geometry simple and symmetrical — heraldic curves, rivets, and banners creep in and destroy scalability. As with every logo, generate the symbol on its own: Flux mangles lettering, so add the company name later in a vector tool where you control the type.

Variations to try

  • Checkmark variant — swap the keyhole for a bold tick in negative space to signal verified and protected
  • Badge lockup — set the shield inside a thin circular ring for an antivirus or certification seal
geometric minimal logo design branding

What to do next

Explore more →

Browse the full Flux prompt library — every entry tested with its settings.
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For developers — copy this prompt as JSON 
{
  "title": "Geometric Shield Security Logo",
  "prompt": "A minimal geometric security logo, one bold shield with clean symmetrical edges, a keyhole cut from the center as negative space, flat 2D vector, solid deep-navy mark on pure white, no gradients, no shadows, no text, scalable cybersecurity brand symbol",
  "model": "Flux",
  "model_version": "Flux.1 dev",
  "settings": {
    "aspect_ratio": "1:1",
    "steps": 28,
    "cfg": 3.5
  },
  "style_tags": [
    "geometric",
    "minimal"
  ],
  "use_case_tags": [
    "logo-design",
    "branding"
  ],
  "source_url": "https://promptkoi.com/prompts/flux/geometric-shield-security-logo/"
}

The whole library is available as an open JSON dataset · developer docs.