ColorBlacklistBrand [rule] v1.0.0

Forbids the canonical AI-slop color palette — Inter-purple (#6366F1 / oklch(60% 0.20 280)), pure black (#000) on pure white (#fff) body, and the default browser blue link (#0000EE / #1A0DAB) — from production artifacts. These choices broadcast 'LLM-generated commodity output' and erase brand identity.

Checks

• @community/check-color-blacklist-brand

Applies To

@community/type-html-artifact

Severity

high

Severity Combination

blacklist color appears as primary/brand → BLOCK
blacklist color appears only as fallback → WARN
no blacklist color present              → PASS

Failure Mode

Output is visually indistinguishable from a default shadcn/ui scaffold; the brand has no visual signature; reviewers and users perceive the product as 'AI-generated', reducing trust and perceived craftsmanship.

Remediation

• Replace Inter-purple with a brand-specific oklch() hue — derive from a real brand asset, not from a Tailwind default. See @impeccable/template-oklch-palette.
• Replace #000 body text with oklch(20% 0.01 <brand-hue>) and #fff body background with oklch(98% 0.005 <brand-hue>) — small chroma keeps the surface alive.
• Replace default blue links with a derived brand accent at adequate contrast (≥ 4.5:1 against body bg).

Exceptions

• • Case: System / OS native dialogs
  • Allowed When: Color is rendered by the user agent (e.g. picker chrome) and cannot be overridden.
• • Case: Brand palette legitimately uses one of these values
  • Allowed When: Brand book documents the value as official; in this case it is not 'AI-slop' but a coincidence — annotate with data-brand-color='true' to opt out.

ColorBlacklistBrand [rule] v1.0.0

Forbids the canonical AI-slop color palette — Inter-purple (#6366F1 / oklch(60% 0.20 280)), pure black (#000) on pure white (#fff) body, and the default browser blue link (#0000EE / #1A0DAB) — from production artifacts. These choices broadcast 'LLM-generated commodity output' and erase brand identity.

Checks

• @community/check-color-blacklist-brand

Applies To

@community/type-html-artifact

Severity

high

Severity Combination

blacklist color appears as primary/brand → BLOCK
blacklist color appears only as fallback → WARN
no blacklist color present              → PASS

Failure Mode

Output is visually indistinguishable from a default shadcn/ui scaffold; the brand has no visual signature; reviewers and users perceive the product as 'AI-generated', reducing trust and perceived craftsmanship.

Remediation

• Replace Inter-purple with a brand-specific oklch() hue — derive from a real brand asset, not from a Tailwind default. See @impeccable/template-oklch-palette.
• Replace #000 body text with oklch(20% 0.01 <brand-hue>) and #fff body background with oklch(98% 0.005 <brand-hue>) — small chroma keeps the surface alive.
• Replace default blue links with a derived brand accent at adequate contrast (≥ 4.5:1 against body bg).

Exceptions

• • Case: System / OS native dialogs
  • Allowed When: Color is rendered by the user agent (e.g. picker chrome) and cannot be overridden.
• • Case: Brand palette legitimately uses one of these values
  • Allowed When: Brand book documents the value as official; in this case it is not 'AI-slop' but a coincidence — annotate with data-brand-color='true' to opt out.

Applies To

@community/type-html-artifact

Severity

high

Validates With

• @impeccable/anti-pattern-ai-slop-palette
• @impeccable/counter-example-inter-purple-dark

Severity Combination

blacklist color appears as primary/brand → BLOCK
blacklist color appears only as fallback → WARN
no blacklist color present              → PASS

Failure Mode

Output is visually indistinguishable from a default shadcn/ui scaffold; the brand has no visual signature; reviewers and users perceive the product as 'AI-generated', reducing trust and perceived craftsmanship.

Remediation

• Replace Inter-purple with a brand-specific oklch() hue — derive from a real brand asset, not from a Tailwind default. See @impeccable/template-oklch-palette.
• Replace #000 body text with oklch(20% 0.01 <brand-hue>) and #fff body background with oklch(98% 0.005 <brand-hue>) — small chroma keeps the surface alive.
• Replace default blue links with a derived brand accent at adequate contrast (≥ 4.5:1 against body bg).

Exceptions

• • Case: System / OS native dialogs
  • Allowed When: Color is rendered by the user agent (e.g. picker chrome) and cannot be overridden.
• • Case: Brand palette legitimately uses one of these values
  • Allowed When: Brand book documents the value as official; in this case it is not 'AI-slop' but a coincidence — annotate with data-brand-color='true' to opt out.

See Also

• @community/check-color-blacklist-brand