todo: make this usage guide better.

fixes #1

Author: grahammccarthy

README.md

@@ -31,4 +31,51 @@ Not requred, but you can addd the Csscolor alias if you want.
 
     'Csscolor' => 'SoapBox\Csscolor\Facade'
 )
+```
+
+
+## How to Use:
+
+All you need to do is put the HEX values into a colour object
+```php
+$color = Csscolor::make('3D88C8');
+
+$color->bg['0']; // returns the same colour as entered
+$color->bg['+1']; // +1 to +5 and -1 to -5 to return variations of the colour to work with gradiants
+$color->fg['0']; // returns a colour that can sit on the foreground of the defined hex value
+...
+
+```
+
+A var_dump of the $color objects instanciated with the color #3D88C8 look like the following:
+```php
+object(SoapBox\Csscolor\Csscolor)[1109]
+  public 'bg' => 
+    array (size=11)
+      0 => string '3D88C8' (length=6)
+      '+1' => string '5a9ad0' (length=6)
+      '+2' => string '6ea6d6' (length=6)
+      '+3' => string '9fc4e4' (length=6)
+      '+4' => string 'cee1f1' (length=6)
+      '+5' => string 'ecf4fa' (length=6)
+      -1 => string '3474aa' (length=6)
+      -2 => string '2e6696' (length=6)
+      -3 => string '1f4464' (length=6)
+      -4 => string '0f2232' (length=6)
+      -5 => string '060e14' (length=6)
+  public 'fg' => 
+    array (size=11)
+      0 => string 'ffffff' (length=6)
+      '+1' => string '000000' (length=6)
+      '+2' => string '000000' (length=6)
+      '+3' => string '000000' (length=6)
+      '+4' => string '0f2232' (length=6)
+      '+5' => string '1f4464' (length=6)
+      -1 => string 'ffffff' (length=6)
+      -2 => string 'ffffff' (length=6)
+      -3 => string 'ffffff' (length=6)
+      -4 => string 'cee1f1' (length=6)
+      -5 => string '9fc4e4' (length=6)
+  public 'minBrightDiff' => int 126
+  public 'minColorDiff' => int 500
 ```