diff --git a/packages/types/src/global-settings.ts b/packages/types/src/global-settings.ts
index 579356ae2d45..10effdb2c65e 100644
--- a/packages/types/src/global-settings.ts
+++ b/packages/types/src/global-settings.ts
@@ -184,6 +184,7 @@ export const globalSettingsSchema = z.object({
 	hasOpenedModeSelector: z.boolean().optional(),
 	lastModeExportPath: z.string().optional(),
 	lastModeImportPath: z.string().optional(),
+	accentColor: z.string().optional(),
 })
 
 export type GlobalSettings = z.infer<typeof globalSettingsSchema>
diff --git a/src/core/webview/webviewMessageHandler.ts b/src/core/webview/webviewMessageHandler.ts
index 0a4bd9abb90c..14608c7a52aa 100644
--- a/src/core/webview/webviewMessageHandler.ts
+++ b/src/core/webview/webviewMessageHandler.ts
@@ -1692,6 +1692,10 @@ export const webviewMessageHandler = async (
 			await updateGlobalState("reasoningBlockCollapsed", message.bool ?? true)
 			// No need to call postStateToWebview here as the UI already updated optimistically
 			break
+		case "setAccentColor":
+			await updateGlobalState("accentColor", message.text ?? undefined)
+			await provider.postStateToWebview()
+			break
 		case "toggleApiConfigPin":
 			if (message.text) {
 				const currentPinned = getGlobalState("pinnedApiConfigs") ?? {}
diff --git a/src/shared/WebviewMessage.ts b/src/shared/WebviewMessage.ts
index f10808cd428d..4482cfacb337 100644
--- a/src/shared/WebviewMessage.ts
+++ b/src/shared/WebviewMessage.ts
@@ -199,6 +199,7 @@ export interface WebviewMessage {
 		| "profileThresholds"
 		| "setHistoryPreviewCollapsed"
 		| "setReasoningBlockCollapsed"
+		| "setAccentColor"
 		| "openExternal"
 		| "filterMarketplaceItems"
 		| "marketplaceButtonClicked"
diff --git a/webview-ui/src/App.tsx b/webview-ui/src/App.tsx
index 220c8cf3af2b..e17245177c64 100644
--- a/webview-ui/src/App.tsx
+++ b/webview-ui/src/App.tsx
@@ -79,6 +79,7 @@ const App = () => {
 		cloudOrganizations,
 		renderContext,
 		mdmCompliant,
+		accentColor,
 	} = useExtensionState()
 
 	// Create a persistent state manager
@@ -233,6 +234,18 @@ const App = () => {
 			}
 		}, [renderContext]),
 	)
+
+	// Apply accent color to CSS custom property
+	useEffect(() => {
+		if (accentColor) {
+			document.documentElement.style.setProperty("--accent", accentColor)
+			document.documentElement.style.setProperty("--color-accent", accentColor)
+		} else {
+			// Reset to default when no accent color is set
+			document.documentElement.style.removeProperty("--accent")
+			document.documentElement.style.removeProperty("--color-accent")
+		}
+	}, [accentColor])
 	// Track marketplace tab views
 	useEffect(() => {
 		if (tab === "marketplace") {
diff --git a/webview-ui/src/components/settings/SettingsView.tsx b/webview-ui/src/components/settings/SettingsView.tsx
index 506eabc4cb50..7f97233b8b87 100644
--- a/webview-ui/src/components/settings/SettingsView.tsx
+++ b/webview-ui/src/components/settings/SettingsView.tsx
@@ -791,6 +791,7 @@ const SettingsView = forwardRef<SettingsViewRef, SettingsViewProps>(({ onDone, t
 					{activeTab === "ui" && (
 						<UISettings
 							reasoningBlockCollapsed={reasoningBlockCollapsed ?? true}
+							accentColor={extensionState.accentColor}
 							setCachedStateField={setCachedStateField}
 						/>
 					)}
diff --git a/webview-ui/src/components/settings/UISettings.tsx b/webview-ui/src/components/settings/UISettings.tsx
index 2de16e688224..19fbb08a39ce 100644
--- a/webview-ui/src/components/settings/UISettings.tsx
+++ b/webview-ui/src/components/settings/UISettings.tsx
@@ -1,6 +1,6 @@
-import { HTMLAttributes } from "react"
+import { HTMLAttributes, useState, useEffect } from "react"
 import { useAppTranslation } from "@/i18n/TranslationContext"
-import { VSCodeCheckbox } from "@vscode/webview-ui-toolkit/react"
+import { VSCodeCheckbox, VSCodeTextField } from "@vscode/webview-ui-toolkit/react"
 import { Glasses } from "lucide-react"
 import { telemetryClient } from "@/utils/TelemetryClient"
 
@@ -11,11 +11,18 @@ import { ExtensionStateContextType } from "@/context/ExtensionStateContext"
 
 interface UISettingsProps extends HTMLAttributes<HTMLDivElement> {
 	reasoningBlockCollapsed: boolean
+	accentColor?: string
 	setCachedStateField: SetCachedStateField<keyof ExtensionStateContextType>
 }
 
-export const UISettings = ({ reasoningBlockCollapsed, setCachedStateField, ...props }: UISettingsProps) => {
+export const UISettings = ({ reasoningBlockCollapsed, accentColor, setCachedStateField, ...props }: UISettingsProps) => {
 	const { t } = useAppTranslation()
+	const [colorValue, setColorValue] = useState(accentColor || "")
+
+	// Sync local state with prop changes
+	useEffect(() => {
+		setColorValue(accentColor || "")
+	}, [accentColor])
 
 	const handleReasoningBlockCollapsedChange = (value: boolean) => {
 		setCachedStateField("reasoningBlockCollapsed", value)
@@ -26,6 +33,20 @@ export const UISettings = ({ reasoningBlockCollapsed, setCachedStateField, ...pr
 		})
 	}
 
+	const handleAccentColorChange = (value: string) => {
+		setColorValue(value)
+		// Only update if it's a valid color or empty
+		const trimmedValue = value.trim()
+		if (trimmedValue === "" || /^#[0-9A-Fa-f]{6}$/.test(trimmedValue)) {
+			setCachedStateField("accentColor", trimmedValue || undefined)
+
+			// Track telemetry event
+			telemetryClient.capture("ui_settings_accent_color_changed", {
+				hasColor: trimmedValue !== "",
+			})
+		}
+	}
+
 	return (
 		<div {...props}>
 			<SectionHeader>
@@ -49,6 +70,33 @@ export const UISettings = ({ reasoningBlockCollapsed, setCachedStateField, ...pr
 							{t("settings:ui.collapseThinking.description")}
 						</div>
 					</div>
+
+					{/* Accent Color Setting */}
+					<div className="flex flex-col gap-2">
+						<label className="font-medium" htmlFor="accent-color-input">
+							Accent Color
+						</label>
+						<div className="flex items-center gap-2">
+							<VSCodeTextField
+								id="accent-color-input"
+								value={colorValue}
+								placeholder="#007ACC"
+								onInput={(e: any) => handleAccentColorChange(e.target.value)}
+								data-testid="accent-color-input"
+								style={{ flex: 1 }}
+							/>
+							<input
+								type="color"
+								value={colorValue && /^#[0-9A-Fa-f]{6}$/.test(colorValue) ? colorValue : "#007ACC"}
+								onChange={(e) => handleAccentColorChange(e.target.value)}
+								className="h-8 w-16 cursor-pointer rounded border border-vscode-input-border"
+								data-testid="accent-color-picker"
+							/>
+						</div>
+						<div className="text-vscode-descriptionForeground text-sm">
+							Customize the accent color used throughout the extension. Leave empty to use the default theme color. Enter a hex color code (e.g., #007ACC) or use the color picker.
+						</div>
+					</div>
 				</div>
 			</Section>
 		</div>
diff --git a/webview-ui/src/context/ExtensionStateContext.tsx b/webview-ui/src/context/ExtensionStateContext.tsx
index 6443ccad93d5..119b0f90ed91 100644
--- a/webview-ui/src/context/ExtensionStateContext.tsx
+++ b/webview-ui/src/context/ExtensionStateContext.tsx
@@ -165,6 +165,8 @@ export interface ExtensionStateContextType extends ExtensionState {
 	setIncludeCurrentTime: (value: boolean) => void
 	includeCurrentCost?: boolean
 	setIncludeCurrentCost: (value: boolean) => void
+	accentColor?: string
+	setAccentColor: (value: string | undefined) => void
 }
 
 export const ExtensionStateContext = createContext<ExtensionStateContextType | undefined>(undefined)
@@ -298,6 +300,7 @@ export const ExtensionStateContextProvider: React.FC<{ children: React.ReactNode
 	const [prevCloudIsAuthenticated, setPrevCloudIsAuthenticated] = useState(false)
 	const [includeCurrentTime, setIncludeCurrentTime] = useState(true)
 	const [includeCurrentCost, setIncludeCurrentCost] = useState(true)
+	const [accentColor, setAccentColor] = useState<string | undefined>(undefined)
 
 	const setListApiConfigMeta = useCallback(
 		(value: ProviderSettingsEntry[]) => setState((prevState) => ({ ...prevState, listApiConfigMeta: value })),
@@ -343,6 +346,10 @@ export const ExtensionStateContextProvider: React.FC<{ children: React.ReactNode
 					if ((newState as any).includeCurrentCost !== undefined) {
 						setIncludeCurrentCost((newState as any).includeCurrentCost)
 					}
+					// Update accentColor if present in state message
+					if ((newState as any).accentColor !== undefined) {
+						setAccentColor((newState as any).accentColor)
+					}
 					// Handle marketplace data if present in state message
 					if (newState.marketplaceItems !== undefined) {
 						setMarketplaceItems(newState.marketplaceItems)
@@ -596,6 +603,11 @@ export const ExtensionStateContextProvider: React.FC<{ children: React.ReactNode
 		setIncludeCurrentTime,
 		includeCurrentCost,
 		setIncludeCurrentCost,
+		accentColor,
+		setAccentColor: (value: string | undefined) => {
+			setAccentColor(value)
+			vscode.postMessage({ type: "setAccentColor", text: value })
+		},
 	}
 
 	return <ExtensionStateContext.Provider value={contextValue}>{children}</ExtensionStateContext.Provider>