diff --git a/README.md b/README.md
index a42c06e..6b2b171 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Color Diff
 
-Calculating differences between colors using the CIEDE2000 algorithm
+Calculating differences between colors using the [CIEDE2000 algorithm].
 
 ## Install
 
@@ -10,32 +10,40 @@ Calculating differences between colors using the CIEDE2000 algorithm
 
 Difference between two colors:
 
-    yellow = ColorDiff::Color::RGB.new 255, 255, 0
-    gold   = ColorDiff::Color::RGB.new 255, 215, 0
+```ruby
+yellow = ColorDiff::Color::RGB.new 255, 255, 0
+gold   = ColorDiff::Color::RGB.new 255, 215, 0
 
-    ColorDiff.between yellow, gold
-    # => 11.584521223499245
+ColorDiff.between yellow, gold
+# => 11.584521223499245
+```
 
 Picking the most similar color from a list:
 
-    red    = ColorDiff::Color::RGB.new 255,   0,   0
-    blue   = ColorDiff::Color::RGB.new   0,   0, 255
-    yellow = ColorDiff::Color::RGB.new 255, 255,   0
-    gold   = ColorDiff::Color::RGB.new 255, 215,   0
+```ruby
+red    = ColorDiff::Color::RGB.new 255,   0,   0
+blue   = ColorDiff::Color::RGB.new   0,   0, 255
+yellow = ColorDiff::Color::RGB.new 255, 255,   0
+gold   = ColorDiff::Color::RGB.new 255, 215,   0
 
-    list   = ColorDiff::List.new [red, blue, yellow]
-    list.closest_to(gold) == yellow
-    # => true
+list   = ColorDiff::List.new [red, blue, yellow]
+list.closest_to(gold) == yellow
+# => true
+```
 
 Building a map of nearest match colors from a finite palette:
 
-    red       = ColorDiff::Color::RGB.new 255,  0,  0
-    black     = ColorDiff::Color::RGB.new   0,  0,  0
-    dark_gray = ColorDiff::Color::RGB.new  80, 80, 80
-    maroon    = ColorDiff::Color::RGB.new 128,  0,  0
+```ruby
+red       = ColorDiff::Color::RGB.new 255,  0,  0
+black     = ColorDiff::Color::RGB.new   0,  0,  0
+dark_gray = ColorDiff::Color::RGB.new  80, 80, 80
+maroon    = ColorDiff::Color::RGB.new 128,  0,  0
 
-    list = ColorDiff::List.new [red, black]
-    palette = [dark_gray, maroon]
+list = ColorDiff::List.new [red, black]
+palette = [dark_gray, maroon]
 
-    list.closest_to_map(palette)
-    # => { 'R255G0B0' => maroon, 'R0B0G0' => dark_gray }
+list.closest_to_map(palette)
+# => { 'R255G0B0' => maroon, 'R0B0G0' => dark_gray }
+```
+
+[CIEDE2000 algorithm]: https://en.wikipedia.org/wiki/Color_difference#CIEDE2000