diff --git a/components/extensions/general/WhatsAppLinkPanel.tsx b/components/extensions/general/WhatsAppLinkPanel.tsx
index c2c4f415..f5bf1268 100644
--- a/components/extensions/general/WhatsAppLinkPanel.tsx
+++ b/components/extensions/general/WhatsAppLinkPanel.tsx
@@ -12,7 +12,8 @@
 
 import { useCallback, useEffect, useState } from 'react'
 import { useTranslations } from 'next-intl'
-import { Loader2, MessageCircle, ExternalLink } from 'lucide-react'
+import { Loader2, ExternalLink } from 'lucide-react'
+import { WhatsAppMark } from '@/components/extensions/general/WhatsAppMark'
 import { Button } from '@/components/ui/button'
 import { useToast } from '@/components/ui/use-toast'
 import { useCompany } from '@/contexts/CompanyContext'
@@ -206,7 +207,7 @@ export function WhatsAppLinkPanel() {
               {minted.waLink ? (
                 <Button asChild type="button" size="sm">
                   <a href={minted.waLink} target="_blank" rel="noreferrer">
-                    <MessageCircle className="mr-1.5 h-4 w-4" aria-hidden="true" />
+                    <WhatsAppMark size={16} className="mr-1.5" />
                     {t('open_whatsapp')}
                     <ExternalLink className="ml-1.5 h-3.5 w-3.5" aria-hidden="true" />
                   </a>
diff --git a/components/extensions/general/WhatsAppMark.tsx b/components/extensions/general/WhatsAppMark.tsx
new file mode 100644
index 00000000..3a50cd45
--- /dev/null
+++ b/components/extensions/general/WhatsAppMark.tsx
@@ -0,0 +1,45 @@
+/**
+ * WhatsApp brand mark.
+ *
+ * Inline SVG rather than a bundled asset: it scales, needs no network
+ * request, and survives the CSP. The green (#25D366) is WhatsApp's own and
+ * is deliberately the one place in settings where a brand colour appears:
+ * this marks a third-party channel, so it is identity, not chrome (see
+ * .claude/rules/design.md on colour belonging to actors).
+ *
+ * Decorative by default. Pass a `title` when the mark carries meaning that
+ * the surrounding text does not already state.
+ */
+
+interface WhatsAppMarkProps {
+  /** Edge length in px of the rounded tile. */
+  size?: number
+  /** Accessible name. Omit when adjacent text already says "WhatsApp". */
+  title?: string
+  className?: string
+}
+
+export function WhatsAppMark({ size = 28, title, className }: WhatsAppMarkProps) {
+  return (
+    <svg
+      width={size}
+      height={size}
+      viewBox="0 0 48 48"
+      className={className}
+      role={title ? 'img' : undefined}
+      aria-hidden={title ? undefined : true}
+      aria-label={title}
+    >
+      {title ? <title>{title}</title> : null}
+      <rect width="48" height="48" rx="10" fill="#25D366" />
+      <path
+        fill="#FFFFFF"
+        d="M32.9 26.8c-.5-.3-3-1.5-3.4-1.6-.5-.2-.8-.3-1.1.2-.3.5-1.3 1.6-1.6 2-.3.3-.6.4-1.1.1-.5-.3-2.1-.8-4-2.5-1.5-1.3-2.5-3-2.8-3.5-.3-.5 0-.8.2-1 .2-.2.5-.6.8-.9.2-.3.3-.5.5-.8.2-.3.1-.6 0-.9-.1-.3-1.1-2.7-1.5-3.7-.4-1-.8-.8-1.1-.9h-1c-.3 0-.9.1-1.3.6-.5.5-1.7 1.7-1.7 4.2 0 2.4 1.8 4.8 2 5.1.2.3 3.5 5.4 8.6 7.6 1.2.5 2.1.8 2.9 1.1 1.2.4 2.3.3 3.2.2 1-.1 3-1.2 3.4-2.4.4-1.2.4-2.2.3-2.4-.1-.2-.5-.3-1-.6z"
+      />
+      <path
+        fill="#FFFFFF"
+        d="M24.1 8h-.1c-8.8 0-16 7.2-16 16 0 2.8.7 5.6 2.1 8L8 40l8.2-2.1c2.3 1.3 5 1.9 7.8 1.9h.1c8.8 0 16-7.2 16-16s-7.1-15.8-16-15.8zm9.4 25.2c-2.5 2.5-5.9 3.9-9.4 3.9-2.4 0-4.7-.6-6.7-1.9l-.5-.3-5 1.3 1.3-4.9-.3-.5c-1.4-2.2-2.1-4.7-2.1-7.3 0-7.4 6-13.4 13.4-13.4 3.6 0 6.9 1.4 9.4 3.9 2.5 2.5 3.9 5.9 3.9 9.5.1 3.6-1.4 6.9-3.9 9.4z"
+      />
+    </svg>
+  )
+}
diff --git a/components/settings/SettingsRows.tsx b/components/settings/SettingsRows.tsx
index afa902d2..a8d8fc5a 100644
--- a/components/settings/SettingsRows.tsx
+++ b/components/settings/SettingsRows.tsx
@@ -21,13 +21,23 @@ interface SettingsSectionHeaderProps {
   intro?: React.ReactNode
   /** Right-aligned header action (e.g. "Förhandsvisa faktura", "Skapa nyckel"). */
   action?: React.ReactNode
+  /**
+   * Brand mark for a section that represents a third-party channel
+   * (WhatsApp today). Sections that are just Accounted settings leave this
+   * unset: the serif title carries them, and a decorative icon per tab
+   * would turn the settings rail into a sticker album.
+   */
+  mark?: React.ReactNode
 }
 
-export function SettingsSectionHeader({ title, intro, action }: SettingsSectionHeaderProps) {
+export function SettingsSectionHeader({ title, intro, action, mark }: SettingsSectionHeaderProps) {
   return (
     <header>
       <div className="flex items-baseline justify-between gap-4">
-        <h2 className="font-display text-xl tracking-tight">{title}</h2>
+        <div className="flex items-center gap-2.5">
+          {mark ? <span className="shrink-0 leading-none">{mark}</span> : null}
+          <h2 className="font-display text-xl tracking-tight">{title}</h2>
+        </div>
         {action ? <div className="flex shrink-0 items-center gap-3">{action}</div> : null}
       </div>
       {intro ? (
diff --git a/components/settings/sections/WhatsAppSettingsContent.tsx b/components/settings/sections/WhatsAppSettingsContent.tsx
index d1fe85ba..b49b4156 100644
--- a/components/settings/sections/WhatsAppSettingsContent.tsx
+++ b/components/settings/sections/WhatsAppSettingsContent.tsx
@@ -2,6 +2,7 @@
 
 import { useTranslations } from 'next-intl'
 import { WhatsAppLinkPanel } from '@/components/extensions/general/WhatsAppLinkPanel'
+import { WhatsAppMark } from '@/components/extensions/general/WhatsAppMark'
 import { SettingsSectionHeader } from '@/components/settings/SettingsRows'
 
 export function WhatsAppSettingsContent() {
@@ -10,7 +11,11 @@ export function WhatsAppSettingsContent() {
 
   return (
     <div>
-      <SettingsSectionHeader title={tNav('whatsapp')} intro={tIntro('whatsapp')} />
+      <SettingsSectionHeader
+        title={tNav('whatsapp')}
+        intro={tIntro('whatsapp')}
+        mark={<WhatsAppMark size={26} />}
+      />
       <WhatsAppLinkPanel />
     </div>
   )