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Klassy supports configurable thin window outlines with optional accent colors and contrast blending. Outlines can enhance window visibility and add visual polish.

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Outline Thickness & Rendering

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WindowOutlineThickness
double
default:"1.0"
Thickness of the window outline in pixels.
  • Min: 0.5
  • Max: 10
  • Default: 1.0
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WindowOutlineSnapToWholePixel
bool
default:"true"
When enabled, outline thickness snaps to whole pixel values for crisper rendering. Disable for sub-pixel precision.
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WindowOutlineOverlap
bool
default:"true"
When enabled, the outline overlaps the window border slightly. Creates a more integrated appearance.

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Outline Style

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WindowOutlineStyle
enum
default:"WindowOutlineShadowColor"
The color and style of the window outline. Separate settings exist for active (WindowOutlineStyleActive) and inactive (WindowOutlineStyleInactive) windows.
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WindowOutlineNone
option
No window outline is drawn.
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WindowOutlineShadowColor
option
Default. Use the shadow color for the outline. Provides subtle window definition that matches the shadow.
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WindowOutlineContrast
option
Use a contrasting color calculated from the titlebar color. Automatically adjusts to provide good visibility.
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WindowOutlineAccentColor
option
Use the system accent color for the outline. Creates a colorful, vibrant appearance.
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WindowOutlineAccentWithContrast
option
Blend the accent color with a contrasting color. Balances accent color visibility with outline definition.
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WindowOutlineCustomColor
option
Use a custom color specified by WindowOutlineCustomColor.
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WindowOutlineCustomWithContrast
option
Blend custom color with contrast color.
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LockWindowOutlineStyleActiveInactive
bool
default:"false"
When enabled, active and inactive windows use the same outline style.

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Outline Opacity

Each outline style has its own opacity control, with separate values for active and inactive windows.
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WindowOutlineShadowColorOpacity
int
default:"20"
Opacity percentage for shadow color outline style.
  • Min: 0 (invisible)
  • Max: 100 (fully opaque)
  • Default: 20
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WindowOutlineContrastOpacity
int
default:"25"
Opacity percentage for contrast outline style. Separate values for active and inactive windows.
  • Min: 0
  • Max: 100
  • Default: 25
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WindowOutlineAccentColorOpacity
int
Opacity percentage for accent color outline style. Separate values for active/inactive.
  • Min: 0
  • Max: 100
  • Default (Active): 67
  • Default (Inactive): 25
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WindowOutlineAccentWithContrastOpacity
int
Opacity percentage for accent with contrast outline style. Separate values for active/inactive.
  • Min: 0
  • Max: 100
  • Default (Active): 50
  • Default (Inactive): 20
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WindowOutlineCustomColorOpacity
int
Opacity percentage for custom color outline style. Separate values for active/inactive.
  • Min: 0
  • Max: 100
  • Default (Active): 60
  • Default (Inactive): 25
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WindowOutlineCustomWithContrastOpacity
int
Opacity percentage for custom color with contrast outline style. Separate values for active/inactive.
  • Min: 0
  • Max: 100
  • Default (Active): 40
  • Default (Inactive): 25

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Custom Outline Color

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WindowOutlineCustomColor
color
default:"0, 0, 0"
Custom RGB color for window outline when using WindowOutlineCustomColor or WindowOutlineCustomWithContrast styles. Separate values for active and inactive windows.Format: “R, G, B” where each component is 0-255.
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LockWindowOutlineCustomColorActiveInactive
bool
default:"true"
When enabled, active and inactive windows use the same custom outline color.

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Border Settings

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WindowCornerRadius
double
default:"4"
Corner radius for window borders in pixels. Affects both the window shape and outline curvature.
  • Min: 0 (sharp corners)
  • Max: 24.0
  • Default: 4
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RoundAllCornersWhenNoBorders
bool
default:"true"
When enabled, all four corners are rounded even when window borders are disabled. When disabled, only top corners are rounded when borders are off.
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UseTitleBarColorForAllBorders
bool
default:"true"
When enabled, the entire window border uses the titlebar color. When disabled, borders may use different colors.
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DrawBorderOnMaximizedWindows
bool
default:"false"
When enabled, window borders are drawn even when windows are maximized.
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ColorizeWindowOutlineWithButton
bool
default:"true"
When enabled, the window outline can be tinted based on button hover states, creating visual feedback.

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Visual Examples

The README demonstrates thin window outlines with accent colors: Window Outline with Accent Color
Window outlines are particularly effective when combined with accent colors. The AccentWithContrast styles provide good visibility while maintaining the accent color aesthetic.