fix disabled slider, fixes #275

Author: ButchersBoy

MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.Dark.xaml

@@ -14,7 +14,7 @@
     <SolidColorBrush x:Key="MaterialDesignColumnHeader" Color="#BCFFFFFF"/><!-- 74% -->
 
     <SolidColorBrush x:Key="MaterialDesignCheckBoxOff" Color="#89FFFFFF" />
-    <SolidColorBrush x:Key="MaterialDesignCheckBoxDisabled" Color="#4CFFFFFF" />
+    <SolidColorBrush x:Key="MaterialDesignCheckBoxDisabled" Color="#FF647076" />
 
 	<SolidColorBrush x:Key="MaterialDesignTextBoxBorder" Color="#89FFFFFF" />
 

MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.Light.xaml

@@ -12,9 +12,9 @@
     <SolidColorBrush x:Key="MaterialDesignColumnHeader" Color="#BC000000"/> <!-- 74% -->
 
     <SolidColorBrush x:Key="MaterialDesignCheckBoxOff" Color="#89000000" />
-    <SolidColorBrush x:Key="MaterialDesignCheckBoxDisabled" Color="#42000000" />
-	
-	<SolidColorBrush x:Key="MaterialDesignTextBoxBorder" Color="#89000000" />
+    <SolidColorBrush x:Key="MaterialDesignCheckBoxDisabled" Color="#FFBDBDBD" />
+
+    <SolidColorBrush x:Key="MaterialDesignTextBoxBorder" Color="#89000000" />
 
     <SolidColorBrush x:Key="MaterialDesignDivider" Color="#FFB6B6B6" />
     <SolidColorBrush x:Key="MaterialDesignSelection" Color="#FFDeDeDe" />