diff --git a/src/renderer/extensions/vueNodes/widgets/components/WidgetColorPicker.test.ts b/src/renderer/extensions/vueNodes/widgets/components/WidgetColorPicker.test.ts
index 3f8dbdf54..9213989cd 100644
--- a/src/renderer/extensions/vueNodes/widgets/components/WidgetColorPicker.test.ts
+++ b/src/renderer/extensions/vueNodes/widgets/components/WidgetColorPicker.test.ts
@@ -83,6 +83,46 @@ describe('WidgetColorPicker Value Binding', () => {
       expect(emitted).toBeDefined()
       expect(emitted![0]).toContain('#ff00ff')
     })
+
+    it('normalizes bare hex without # to #hex on emit', async () => {
+      const widget = createMockWidget('ff0000')
+      const wrapper = mountComponent(widget, 'ff0000')
+
+      const emitted = await setColorPickerValue(wrapper, '00ff00')
+      expect(emitted).toBeDefined()
+      expect(emitted![0]).toContain('#00ff00')
+    })
+
+    it('normalizes rgb() strings to #hex on emit', async () => {
+      const widget = createMockWidget('#000000')
+      const wrapper = mountComponent(widget, '#000000')
+
+      const emitted = await setColorPickerValue(wrapper, 'rgb(255, 0, 0)')
+      expect(emitted).toBeDefined()
+      expect(emitted![0]).toContain('#ff0000')
+    })
+
+    it('normalizes hsb() strings to #hex on emit', async () => {
+      const widget = createMockWidget('#000000', { format: 'hsb' })
+      const wrapper = mountComponent(widget, '#000000')
+
+      const emitted = await setColorPickerValue(wrapper, 'hsb(120, 100, 100)')
+      expect(emitted).toBeDefined()
+      expect(emitted![0]).toContain('#00ff00')
+    })
+
+    it('normalizes HSB object values to #hex on emit', async () => {
+      const widget = createMockWidget('#000000', { format: 'hsb' })
+      const wrapper = mountComponent(widget, '#000000')
+
+      const emitted = await setColorPickerValue(wrapper, {
+        h: 240,
+        s: 100,
+        b: 100
+      } as any)
+      expect(emitted).toBeDefined()
+      expect(emitted![0]).toContain('#0000ff')
+    })
   })
 
   describe('Component Rendering', () => {
diff --git a/src/renderer/extensions/vueNodes/widgets/components/WidgetColorPicker.vue b/src/renderer/extensions/vueNodes/widgets/components/WidgetColorPicker.vue
index 7202bd959..3fc4830fa 100644
--- a/src/renderer/extensions/vueNodes/widgets/components/WidgetColorPicker.vue
+++ b/src/renderer/extensions/vueNodes/widgets/components/WidgetColorPicker.vue
@@ -29,6 +29,7 @@ import { computed } from 'vue'
 
 import { useWidgetValue } from '@/composables/graph/useWidgetValue'
 import type { SimplifiedWidget } from '@/types/simplifiedWidget'
+import { hsbToRgb, parseToRgb, rgbToHex } from '@/utils/colorUtil'
 import { cn } from '@/utils/tailwindUtil'
 import {
   PANEL_EXCLUDED_PROPS,
@@ -49,11 +50,58 @@ const emit = defineEmits<{
 }>()
 
 // Use the composable for consistent widget value handling
+function normalizeToHexWithHash(value: unknown): string {
+  if (typeof value === 'string') {
+    const raw = value.trim()
+    // Bare hex without '#'
+    if (/^[0-9a-fA-F]{3}$/.test(raw) || /^[0-9a-fA-F]{6}$/.test(raw)) {
+      return `#${raw.toLowerCase()}`
+    }
+    // If starts with '#', ensure lower-case and valid length
+    if (raw.startsWith('#')) {
+      const hex = raw.toLowerCase()
+      if (hex.length === 4 || hex.length === 7) return hex
+      // Fallback: attempt parse via RGB and re-encode
+    }
+    // rgb(), rgba(), hsl(), hsla()
+    if (/^(rgb|rgba|hsl|hsla)\(/i.test(raw)) {
+      const rgb = parseToRgb(raw)
+      return rgbToHex(rgb).toLowerCase()
+    }
+    // hsb(h,s,b)
+    if (/^hsb\(/i.test(raw)) {
+      const nums = raw.match(/\d+(?:\.\d+)?/g)?.map(Number) || []
+      if (nums.length >= 3) {
+        const rgb = hsbToRgb({ h: nums[0], s: nums[1], b: nums[2] })
+        return rgbToHex(rgb).toLowerCase()
+      }
+    }
+  }
+  // HSB object from PrimeVue
+  if (
+    value &&
+    typeof value === 'object' &&
+    'h' in (value as any) &&
+    's' in (value as any) &&
+    ('b' in (value as any) || 'v' in (value as any))
+  ) {
+    const h = Number((value as any).h)
+    const s = Number((value as any).s)
+    const b = Number((value as any).b ?? (value as any).v)
+    const rgb = hsbToRgb({ h, s, b })
+    return rgbToHex(rgb).toLowerCase()
+  }
+  // Fallback to default black
+  return '#000000'
+}
+
 const { localValue, onChange } = useWidgetValue({
   widget: props.widget,
-  modelValue: props.modelValue,
+  // Normalize initial model value to ensure leading '#'
+  modelValue: normalizeToHexWithHash(props.modelValue),
   defaultValue: '#000000',
-  emit
+  emit,
+  transform: (val: unknown) => normalizeToHexWithHash(val)
 })
 
 // ColorPicker specific excluded props include panel/overlay classes
diff --git a/src/utils/colorUtil.ts b/src/utils/colorUtil.ts
index e6df94953..2acbccc36 100644
--- a/src/utils/colorUtil.ts
+++ b/src/utils/colorUtil.ts
@@ -1,6 +1,7 @@
 import { memoize } from 'es-toolkit/compat'
 
-type RGB = { r: number; g: number; b: number }
+export type RGB = { r: number; g: number; b: number }
+export type HSB = { h: number; s: number; b: number }
 type HSL = { h: number; s: number; l: number }
 type HSLA = { h: number; s: number; l: number; a: number }
 type ColorFormat = 'hex' | 'rgb' | 'rgba' | 'hsl' | 'hsla'
@@ -59,6 +60,61 @@ export function hexToRgb(hex: string): RGB {
   return { r, g, b }
 }
 
+export function rgbToHex({ r, g, b }: RGB): string {
+  const toHex = (n: number) =>
+    Math.max(0, Math.min(255, Math.round(n)))
+      .toString(16)
+      .padStart(2, '0')
+  return `#${toHex(r)}${toHex(g)}${toHex(b)}`
+}
+
+export function hsbToRgb({ h, s, b }: HSB): RGB {
+  // Normalize
+  const hh = ((h % 360) + 360) % 360
+  const ss = Math.max(0, Math.min(100, s)) / 100
+  const vv = Math.max(0, Math.min(100, b)) / 100
+
+  const c = vv * ss
+  const x = c * (1 - Math.abs(((hh / 60) % 2) - 1))
+  const m = vv - c
+
+  let rp = 0,
+    gp = 0,
+    bp = 0
+
+  if (hh < 60) {
+    rp = c
+    gp = x
+    bp = 0
+  } else if (hh < 120) {
+    rp = x
+    gp = c
+    bp = 0
+  } else if (hh < 180) {
+    rp = 0
+    gp = c
+    bp = x
+  } else if (hh < 240) {
+    rp = 0
+    gp = x
+    bp = c
+  } else if (hh < 300) {
+    rp = x
+    gp = 0
+    bp = c
+  } else {
+    rp = c
+    gp = 0
+    bp = x
+  }
+
+  return {
+    r: Math.round((rp + m) * 255),
+    g: Math.round((gp + m) * 255),
+    b: Math.round((bp + m) * 255)
+  }
+}
+
 export function parseToRgb(color: string): RGB {
   const format = identifyColorFormat(color)
   if (!format) return { r: 0, g: 0, b: 0 }