diff --git a/macos/Ghostty.xcodeproj/project.pbxproj b/macos/Ghostty.xcodeproj/project.pbxproj
index a80f3b4b7..8c8e327d4 100644
--- a/macos/Ghostty.xcodeproj/project.pbxproj
+++ b/macos/Ghostty.xcodeproj/project.pbxproj
@@ -65,8 +65,8 @@
 		A5E112952AF73E8A00C6E0C2 /* ClipboardConfirmationController.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5E112942AF73E8A00C6E0C2 /* ClipboardConfirmationController.swift */; };
 		A5E112972AF7401B00C6E0C2 /* ClipboardConfirmationView.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5E112962AF7401B00C6E0C2 /* ClipboardConfirmationView.swift */; };
 		A5FEB3002ABB69450068369E /* main.swift in Sources */ = {isa = PBXBuildFile; fileRef = A5FEB2FF2ABB69450068369E /* main.swift */; };
-		C159E81D2B66A06B00FDFE9C /* NSColor+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = C159E81C2B66A06B00FDFE9C /* NSColor+Extension.swift */; };
-		C159E8402B68EB0000FDFE9C /* UIColor+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = C159E83F2B68EB0000FDFE9C /* UIColor+Extension.swift */; };
+		C159E81D2B66A06B00FDFE9C /* OSColor+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = C159E81C2B66A06B00FDFE9C /* OSColor+Extension.swift */; };
+		C159E89D2B69A2EF00FDFE9C /* OSColor+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = C159E81C2B66A06B00FDFE9C /* OSColor+Extension.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -125,8 +125,7 @@
 		A5E112942AF73E8A00C6E0C2 /* ClipboardConfirmationController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ClipboardConfirmationController.swift; sourceTree = "<group>"; };
 		A5E112962AF7401B00C6E0C2 /* ClipboardConfirmationView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ClipboardConfirmationView.swift; sourceTree = "<group>"; };
 		A5FEB2FF2ABB69450068369E /* main.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = main.swift; sourceTree = "<group>"; };
-		C159E81C2B66A06B00FDFE9C /* NSColor+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "NSColor+Extension.swift"; sourceTree = "<group>"; };
-		C159E83F2B68EB0000FDFE9C /* UIColor+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIColor+Extension.swift"; sourceTree = "<group>"; };
+		C159E81C2B66A06B00FDFE9C /* OSColor+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "OSColor+Extension.swift"; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -191,8 +190,7 @@
 				8503D7C62A549C66006CFF3D /* FullScreenHandler.swift */,
 				A59630962AEE163600D64628 /* HostingWindow.swift */,
 				A59FB5D02AE0DEA7009128F3 /* MetalView.swift */,
-				C159E81C2B66A06B00FDFE9C /* NSColor+Extension.swift */,
-				C159E83F2B68EB0000FDFE9C /* UIColor+Extension.swift */,
+				C159E81C2B66A06B00FDFE9C /* OSColor+Extension.swift */,
 				A5CEAFDA29B8005900646FDA /* SplitView */,
 			);
 			path = Helpers;
@@ -495,7 +493,7 @@
 				A5E112952AF73E8A00C6E0C2 /* ClipboardConfirmationController.swift in Sources */,
 				8503D7C72A549C66006CFF3D /* FullScreenHandler.swift in Sources */,
 				A596309E2AEE1D6C00D64628 /* TerminalView.swift in Sources */,
-				C159E81D2B66A06B00FDFE9C /* NSColor+Extension.swift in Sources */,
+				C159E81D2B66A06B00FDFE9C /* OSColor+Extension.swift in Sources */,
 				A5CEAFDE29B8058B00646FDA /* SplitView.Divider.swift in Sources */,
 				A5E112972AF7401B00C6E0C2 /* ClipboardConfirmationView.swift in Sources */,
 				A514C8D82B54DC6800493A16 /* Ghostty.App.swift in Sources */,
@@ -509,12 +507,12 @@
 				A53D0C942B53B43700305CE6 /* iOSApp.swift in Sources */,
 				A514C8D72B54A16400493A16 /* Ghostty.Config.swift in Sources */,
 				A5333E232B5A219A008AEFF7 /* SurfaceView.swift in Sources */,
-				C159E8402B68EB0000FDFE9C /* UIColor+Extension.swift in Sources */,
 				A5333E202B5A2111008AEFF7 /* SurfaceView_UIKit.swift in Sources */,
 				A5333E1D2B5A1CE3008AEFF7 /* CrossKit.swift in Sources */,
 				A53D0C9C2B543F7B00305CE6 /* Package.swift in Sources */,
 				A53D0C9B2B543F3B00305CE6 /* Ghostty.App.swift in Sources */,
 				A5333E242B5A22D9008AEFF7 /* Ghostty.Shell.swift in Sources */,
+				C159E89D2B69A2EF00FDFE9C /* OSColor+Extension.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
diff --git a/macos/Sources/Ghostty/Ghostty.Config.swift b/macos/Sources/Ghostty/Ghostty.Config.swift
index 7cad80bc8..8b1146e14 100644
--- a/macos/Sources/Ghostty/Ghostty.Config.swift
+++ b/macos/Sources/Ghostty/Ghostty.Config.swift
@@ -262,17 +262,10 @@ extension Ghostty {
         // This isn't actually a configurable value currently but it could be done day.
         // We put it here because it is a color that changes depending on the configuration.
         var splitDividerColor: Color {
-            #if canImport(AppKit)
-            let backgroundColor = NSColor(backgroundColor)
+            let backgroundColor = OSColor(backgroundColor)
             let isLightBackground = backgroundColor.isLightColor
-            let newColor = isLightBackground ? backgroundColor.shadow(withLevel: 0.1) : backgroundColor.shadow(withLevel: 0.4)
-            return Color(nsColor: newColor ?? .gray.withAlphaComponent(0.5))
-            #else
-            let backgroundColor = UIColor(backgroundColor)
-            let isLightBackground = backgroundColor.isLightColor
-            let newColor = isLightBackground ? backgroundColor.darken(by: 0.1) : backgroundColor.darken(by: 0.4)
+            let newColor = isLightBackground ? backgroundColor.darken(by: 0.08) : backgroundColor.darken(by: 0.4)
             return Color(newColor)
-            #endif
         }
     }
 }
diff --git a/macos/Sources/Helpers/NSColor+Extension.swift b/macos/Sources/Helpers/NSColor+Extension.swift
deleted file mode 100644
index a1f371f96..000000000
--- a/macos/Sources/Helpers/NSColor+Extension.swift
+++ /dev/null
@@ -1,14 +0,0 @@
-import AppKit
-
-extension NSColor {
-    var isLightColor: Bool {
-        var r: CGFloat = 0
-        var g: CGFloat = 0
-        var b: CGFloat = 0
-        var a: CGFloat = 0
-
-        self.getRed(&r, green: &g, blue: &b, alpha: &a)
-        let luminance = (0.299 * r) + (0.587 * g) + (0.114 * b)
-        return luminance > 0.5
-    }
-}
diff --git a/macos/Sources/Helpers/UIColor+Extension.swift b/macos/Sources/Helpers/OSColor+Extension.swift
similarity index 75%
rename from macos/Sources/Helpers/UIColor+Extension.swift
rename to macos/Sources/Helpers/OSColor+Extension.swift
index a839916ea..f8bfcd134 100644
--- a/macos/Sources/Helpers/UIColor+Extension.swift
+++ b/macos/Sources/Helpers/OSColor+Extension.swift
@@ -1,6 +1,6 @@
-import UIKit
+import Foundation
 
-extension UIColor {
+extension OSColor {
     var isLightColor: Bool {
         var r: CGFloat = 0
         var g: CGFloat = 0
@@ -12,9 +12,9 @@ extension UIColor {
         return luminance > 0.5
     }
 
-    func darken(by amount: CGFloat) -> UIColor {
+    func darken(by amount: CGFloat) -> OSColor {
         var h: CGFloat = 0, s: CGFloat = 0, b: CGFloat = 0, a: CGFloat = 0
         self.getHue(&h, saturation: &s, brightness: &b, alpha: &a)
-        return UIColor(hue: h, saturation: s, brightness: min(b * (1 - amount), 1), alpha: a)
+        return OSColor(hue: h, saturation: s, brightness: min(b * (1 - amount), 1), alpha: a)
     }
 }