[Slider] Added Theming Section to README
MODIFY
components/Slider/README.md
components/Slider/README.md
@@ -111,6 +111,52 @@ func didChangeSliderValue(senderSlider:MDCSlider) {
```
<!--</div>-->
+### Theming
+
+You can theme a Slider with your app's color scheme using the ColorThemer extension.
+
+You must first add the color themer extension to your project:
+
+``` bash
+pod 'MaterialComponents/Slider+Extensions/ColorThemer'
+```
+
+You can then import the theming APIs:
+
+<!--<div class="material-code-render" markdown="1">-->
+#### Swift
+``` swift
+import MaterialComponents.MaterialSlider_ColorThemer
+```
+
+#### Objective-C
+
+``` objc
+#import "MaterialSlider+ColorThemer.h"
+```
+<!--</div>-->
+
+MDCSliderColorThemer allows you to theme an slider with your app's color scheme.
+
+<!--<div class="material-code-render" markdown="1">-->
+#### Swift
+``` swift
+let colorScheme = MDCSemanticColorScheme()
+
+let slider = MDCSlider()
+MDCSliderColorThemer.applySemanticColorScheme(colorScheme, to: slider)
+```
+
+#### Objective-C
+
+``` objc
+id<MDCColorScheming> colorScheme = [[MDCSemanticColorScheme alloc] init];
+
+MDCSlider *slider = [[MDCSlider alloc] init];
+[MDCSliderColorThemer applySemanticColorScheme:colorScheme toSlider:slider];
+
+```
+<!--</div>-->
### The differences between the UISlider class and the MDCSlider class:
Does not have api to:

[Slider] Added Theming Section to README (#3530)