diff --git a/.travis.yml b/.travis.yml
index ff331d4..a25eeb1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,14 +4,21 @@ php:
   - 5.3
   - 5.4
   - 5.5
+  - 5.6
+  - 7.0
   - hhvm
 
 matrix:
   allow_failures:
+    - php: 7.0
     - php: hhvm
 
-before_script:
-    - COMPOSER_ROOT_VERSION=dev-master composer --prefer-source --dev --no-interaction install
+before_install:
+  - if [ "$TRAVIS_PHP_VERSION" != "hhvm" ]; then phpenv config-rm xdebug.ini; fi
+  - composer selfupdate
+
+install:
+  - COMPOSER_ROOT_VERSION=dev-master composer --prefer-source --no-interaction install
 
 script:
   - bin/phpspec run --format=pretty
diff --git a/spec/PUGX/Poser/BadgeSpec.php b/spec/PUGX/Poser/BadgeSpec.php
index 8a48662..67895fd 100644
--- a/spec/PUGX/Poser/BadgeSpec.php
+++ b/spec/PUGX/Poser/BadgeSpec.php
@@ -60,4 +60,14 @@ function it_should_be_constructed_by_fromURI_factory_method_escaping_correctly_w
             throw new Exception(sprintf("from[%s] wants[%s] having[%s]\n", $input, $assertInput, (string) $it));
         }
     }
+
+    function it_should_validate_available_color_schemes()
+    {
+        $colorSchemes = \PUGX\Poser\Badge::getColorNamesAvailable();
+
+        foreach ($colorSchemes as $colorScheme) {
+            $this->beConstructedWith('a', 'b', $colorScheme, 'svg');
+            $this->getHexColor()->shouldBeString();
+        }
+    }
 }
diff --git a/spec/PUGX/Poser/PoserSpec.php b/spec/PUGX/Poser/PoserSpec.php
index cd00d9f..a91bb3f 100644
--- a/spec/PUGX/Poser/PoserSpec.php
+++ b/spec/PUGX/Poser/PoserSpec.php
@@ -40,9 +40,7 @@ function it_should_be_able_to_generate_an_svg_image_from_URI()
     public function getMatchers()
     {
         return array(
-            'beAValidSVGImageContaining' => function($object, $subject, $status)
-             {
-
+            'beAValidSVGImageContaining' => function($object, $subject, $status) {
                     $regex = '/^<svg.*width="((.|\n)*)'.$subject.'((.|\n)*)'.$status.'((.|\n)*)<\/svg>$/';
                     $matches = array();
 
diff --git a/spec/PUGX/Poser/Render/SvgFlatRenderSpec.php b/spec/PUGX/Poser/Render/SvgFlatRenderSpec.php
index 181c4bb..3f79d2e 100644
--- a/spec/PUGX/Poser/Render/SvgFlatRenderSpec.php
+++ b/spec/PUGX/Poser/Render/SvgFlatRenderSpec.php
@@ -2,17 +2,16 @@
 
 namespace spec\PUGX\Poser\Render;
 
-use PhpSpec\Exception\Exception;
 use PhpSpec\ObjectBehavior;
 use Prophecy\Argument;
 use PUGX\Poser\Badge;
-use PUGX\Poser\Calculator\GDTextSizeCalculator;
 use PUGX\Poser\Calculator\TextSizeCalculatorInterface;
 
 class SvgFlatRenderSpec extends ObjectBehavior
 {
-    function let(TextSizeCalculatorInterface $calculator)
+    function let($calculator)
     {
+        $calculator->beADoubleOf('\PUGX\Poser\Calculator\TextSizeCalculatorInterface');
         $calculator->calculateWidth(Argument::any())->willReturn(20);
         $this->beConstructedWith($calculator);
     }
@@ -66,4 +65,4 @@ function it_should_render_a_license_mit_exactly_like_this_svg()
     }
 
 
-} 
\ No newline at end of file
+} 
diff --git a/spec/PUGX/Poser/Render/SvgFlatSquareRenderSpec.php b/spec/PUGX/Poser/Render/SvgFlatSquareRenderSpec.php
index d16b007..6abc733 100644
--- a/spec/PUGX/Poser/Render/SvgFlatSquareRenderSpec.php
+++ b/spec/PUGX/Poser/Render/SvgFlatSquareRenderSpec.php
@@ -2,17 +2,15 @@
 
 namespace spec\PUGX\Poser\Render;
 
-use PhpSpec\Exception\Exception;
 use PhpSpec\ObjectBehavior;
 use Prophecy\Argument;
 use PUGX\Poser\Badge;
-use PUGX\Poser\Calculator\GDTextSizeCalculator;
-use PUGX\Poser\Calculator\TextSizeCalculatorInterface;
 
 class SvgFlatSquareRenderSpec extends ObjectBehavior
 {
-    function let(TextSizeCalculatorInterface $calculator)
+    function let($calculator)
     {
+        $calculator->beADoubleOf('\PUGX\Poser\Calculator\TextSizeCalculatorInterface');
         $calculator->calculateWidth(Argument::any())->willReturn(20);
         $this->beConstructedWith($calculator);
     }
@@ -64,6 +62,4 @@ function it_should_render_a_license_mit_exactly_like_this_svg()
         $badge = Badge::fromURI('license-MIT-blue.svg');
         $this->render($badge)->__toString()->shouldBeLike($template);
     }
-
-
 }
diff --git a/spec/PUGX/Poser/Render/SvgRenderSpec.php b/spec/PUGX/Poser/Render/SvgRenderSpec.php
index d813024..2793036 100644
--- a/spec/PUGX/Poser/Render/SvgRenderSpec.php
+++ b/spec/PUGX/Poser/Render/SvgRenderSpec.php
@@ -2,16 +2,15 @@
 
 namespace spec\PUGX\Poser\Render;
 
-use PhpSpec\Exception\Exception;
 use PhpSpec\ObjectBehavior;
 use Prophecy\Argument;
 use PUGX\Poser\Badge;
-use PUGX\Poser\Calculator\TextSizeCalculatorInterface;
 
 class SvgRenderSpec extends ObjectBehavior
 {
-    function let(TextSizeCalculatorInterface $calculator)
+    function let($calculator)
     {
+        $calculator->beADoubleOf('\PUGX\Poser\Calculator\TextSizeCalculatorInterface');
         $calculator->calculateWidth(Argument::any())->willReturn(20);
         $this->beConstructedWith($calculator);
     }
@@ -34,4 +33,4 @@ public function getMatchers()
             }
         );
     }
-} 
\ No newline at end of file
+} 
diff --git a/src/Badge.php b/src/Badge.php
index 8c502bd..c14845b 100644
--- a/src/Badge.php
+++ b/src/Badge.php
@@ -6,14 +6,14 @@ class Badge
 {
     CONST DEFAULT_FORMAT = 'svg';
     private static $colorScheme = array(
-        "brightgreen" => "4c1",
+        "brightgreen" => "44cc11",
         "green"       => "97CA00",
         "yellow"      => "dfb317",
         "yellowgreen" => "a4a61d",
         "orange"      => "fe7d37",
         "red"         => "e05d44",
         "blue"        => "007ec6",
-        "grey"        => "555",
+        "grey"        => "555555",
         "lightgray"   => "9f9f9f"
     );