Tweaked dark buttons.

Author: larz0

src/styles/brackets_colors.less

@@ -83,10 +83,11 @@
 @tc-gray-component-focused-border: #2893ef;
 @tc-gray-component-error-border:   #fa689d;
 @tc-gray-component-triangle:       #878787;
-@tc-alt-component-border:          #2d2f31;
+@tc-alt-component-border:          rgba(0, 0, 0, 0.24);
 
 @tc-button-background:             #e5e9e9;
 @tc-button-highlight:              inset 0 1px 0 #f3f3f3;
+@tc-button-alt-highlight:          inset 0 1px 0 rgba(255, 255, 255, 0.06);
 @tc-button-down-background:        #d3d7d7;
 @tc-button-alt-down-background:    #404141;
 @tc-button-down-shadow:            inset 0 1px 0 rgba(0, 0, 0, 0.06);

src/styles/brackets_patterns_override.less

@@ -1136,7 +1136,7 @@ input[type="color"],
         }
 
         &:focus {
-            border: 1px solid @tc-gray-component-focused-border;
+            border: 1px solid @tc-call-to-action-border;
             box-shadow: @tc-call-to-action-highlight, @tc-input-glow;
             outline: none;
         }
@@ -1158,7 +1158,7 @@ input[type="color"],
     text-decoration: none;
     &:hover {
         border: 1px solid @tc-alt-component-border;
-        box-shadow: inset 0 1px 0 @tc-sidebar-selection-highlight;
+        box-shadow: @tc-button-alt-highlight;
     }
     &:active {
         background: @tc-button-alt-down-background;