Merge branch 'update-button-style' into 'master'

Create secondary colors for buttons with SCSS functions [Proper]

## What does this MR do?
* Removes the hardcoded values for button colors and generates them using the `darken` function
* Adds a border color for outline buttons on hover, focus and active states
* Adds darker colors for outline buttons in their active state

## Are there points in the code the reviewer needs to double check?
Naming for new factor variables might not be good enough.

## Why was this MR needed?
Increases visibility of alternate states as specified in #24145

## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?

- [ ] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [ ] All builds are passing
- [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] Branch has no merge conflicts with `master` (if it does - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
Closes #24145

See merge request !7797

app/assets/stylesheets/framework/buttons.scss

@@ -15,7 +15,7 @@
   @include btn-default;
 }
 
-@mixin btn-outline($background, $text, $border, $hover-background, $hover-text, $hover-border) {
+@mixin btn-outline($background, $text, $border, $hover-background, $hover-text, $hover-border, $active-background, $active-border) {
   background-color: $background;
   color: $text;
   border-color: $border;
@@ -23,8 +23,14 @@
   &:hover,
   &:focus {
     background-color: $hover-background;
-    color: $hover-text;
     border-color: $hover-border;
+    color: $hover-text;
+  }
+
+  &:active {
+    background-color: $active-background;
+    border-color: $active-border;
+    color: $hover-text;
   }
 }
 
@@ -82,11 +88,11 @@
 }
 
 @mixin btn-gray {
-  @include btn-color($gray-light, $border-gray-light, $gray-normal, $border-gray-light, $gray-dark, $border-gray-dark, $gl-gray-dark);
+  @include btn-color($gray-light, $border-gray-light, $gray-normal, $border-gray-normal, $gray-dark, $border-gray-dark, $gl-gray-dark);
 }
 
 @mixin btn-white {
-  @include btn-color($white-light, $border-color, $white-normal, $border-white-normal, $white-dark, $border-white-dark, $btn-white-active);
+  @include btn-color($white-light, $border-color, $white-normal, $border-white-normal, $white-dark, $border-white-dark, $gl-text-color);
 }
 
 @mixin btn-with-margin {
@@ -139,11 +145,11 @@
     &.btn-new,
     &.btn-create,
     &.btn-save {
-      @include btn-outline($white-light, $green-normal, $green-normal, $green-light, $white-light, $green-light);
+      @include btn-outline($white-light, $border-green-light, $border-green-light, $green-light, $white-light, $border-green-light, $green-normal, $border-green-normal);
     }
 
     &.btn-remove {
-      @include btn-outline($white-light, $red-normal, $red-normal, $red-light, $white-light, $red-light);
+      @include btn-outline($white-light, $border-red-light, $border-red-light, $red-light, $white-light, $border-red-light, $red-normal, $border-red-normal);
     }
   }
 
@@ -165,11 +171,11 @@
   }
 
   &.btn-close {
-    @include btn-outline($white-light, $orange-normal, $orange-normal, $orange-light, $white-light, $orange-light);
+    @include btn-outline($white-light, $border-orange-light, $border-orange-light, $orange-light, $white-light, $border-orange-light, $orange-normal, $border-orange-normal);
   }
 
   &.btn-spam {
-    @include btn-outline($white-light, $red-normal, $red-normal, $red-light, $white-light, $red-light);
+    @include btn-outline($white-light, $border-red-light, $border-red-light, $red-light, $white-light, $border-red-light, $red-normal, $border-red-normal);
   }
 
   &.btn-danger,
@@ -351,7 +357,7 @@
 
 .btn-inverted {
   &-secondary {
-    @include btn-outline($white-light, $blue-normal, $blue-normal, $blue-light, $white-light, $blue-light);
+    @include btn-outline($white-light, $border-blue-light, $border-blue-light, $blue-light, $white-light, $border-blue-light, $blue-normal, $border-blue-normal);
   }
 }
 

app/assets/stylesheets/framework/variables.scss

@@ -12,67 +12,71 @@ $sidebar-breakpoint: 1024px;
 /*
  * Color schema
  */
+$darken-normal-factor: 7%;
+$darken-dark-factor: 10%;
+$darken-border-factor: 5%;
+
 $white-light: #fff;
-$white-normal: #ededed;
-$white-dark: #ececec;
+$white-normal: darken($white-light, $darken-normal-factor);
+$white-dark: darken($white-light, $darken-dark-factor);
 
 $gray-lightest: #fdfdfd;
 $gray-light: #fafafa;
 $gray-lighter: #f9f9f9;
-$gray-normal: #f5f5f5;
-$gray-dark: #ededed;
+$gray-normal: darken($gray-light, $darken-normal-factor);
+$gray-dark: darken($gray-light, $darken-dark-factor);
 $gray-darker: #eee;
 $gray-darkest: #c9c9c9;
 
-$green-light: #38ae67;
-$green-normal: #2faa60;
-$green-dark: #2ca05b;
+$green-light: #3cbd70;
+$green-normal: darken($green-light, $darken-normal-factor);
+$green-dark: darken($green-light, $darken-dark-factor);
 
 $blue-light: #2ea8e5;
-$blue-normal: #2d9fd8;
-$blue-dark: #2897ce;
+$blue-normal: darken($blue-light, $darken-normal-factor);
+$blue-dark: darken($blue-light, $darken-dark-factor);
 
 $blue-medium-light: #3498cb;
-$blue-medium: #2f8ebf;
-$blue-medium-dark: #2d86b4;
+$blue-medium: darken($blue-medium-light, $darken-normal-factor);
+$blue-medium-dark: darken($blue-medium-light, $darken-dark-factor);
 
 $blue-light-transparent: rgba(44, 159, 216, 0.05);
 
 $orange-light: #fc8a51;
-$orange-normal: #e75e40;
-$orange-dark: #ce5237;
+$orange-normal: darken($orange-light, $darken-normal-factor);
+$orange-dark: darken($orange-light, $darken-dark-factor);
 
 $red-light: #e52c5a;
-$red-normal: #d22852;
-$red-dark: darken($red-normal, 5%);
+$red-normal: darken($red-light, $darken-normal-factor);
+$red-dark: darken($red-light, $darken-dark-factor);
 
 $black: #000;
 $black-transparent: rgba(0, 0, 0, 0.3);
 
-$border-white-light: #f1f2f4;
-$border-white-normal: #d6dae2;
-$border-white-dark: #c6cacf;
+$border-white-light: darken($white-light, $darken-border-factor);
+$border-white-normal: darken($white-normal, $darken-border-factor);
+$border-white-dark: darken($white-dark, $darken-border-factor);
 
-$border-gray-light: #dcdcdc;
-$border-gray-normal: #d7d7d7;
-$border-gray-dark: #c6cacf;
+$border-gray-light: darken($gray-light, $darken-border-factor);
+$border-gray-normal: darken($gray-normal, $darken-border-factor);
+$border-gray-dark: darken($gray-dark, $darken-border-factor);
 
 $border-green-extra-light: #9adb84;
-$border-green-light: #2faa60;
-$border-green-normal: #2ca05b;
-$border-green-dark: #279654;
+$border-green-light: darken($green-light, $darken-border-factor);
+$border-green-normal: darken($green-normal, $darken-border-factor);
+$border-green-dark: darken($green-dark, $darken-border-factor);
 
-$border-blue-light: #2d9fd8;
-$border-blue-normal: #2897ce;
-$border-blue-dark: #258dc1;
+$border-blue-light: darken($blue-light, $darken-border-factor);
+$border-blue-normal: darken($blue-normal, $darken-border-factor);
+$border-blue-dark: darken($blue-dark, $darken-border-factor);
 
-$border-orange-light: #fc6d26;
-$border-orange-normal: #ce5237;
-$border-orange-dark: #c14e35;
+$border-orange-light: darken($orange-light, $darken-border-factor);
+$border-orange-normal: darken($orange-normal, $darken-border-factor);
+$border-orange-dark: darken($orange-dark, $darken-border-factor);
 
-$border-red-light: #d22852;
-$border-red-normal: #ca264f;
-$border-red-dark: darken($border-red-normal, 5%);
+$border-red-light: darken($red-light, $darken-border-factor);
+$border-red-normal: darken($red-normal, $darken-border-factor);
+$border-red-dark: darken($red-dark, $darken-border-factor);
 
 $help-well-bg: $gray-light;
 $help-well-border: #e5e5e5;
@@ -255,7 +259,7 @@ $search-input-border-color: rgba(#4688f1, .8);
 $search-input-focus-shadow-color: $dropdown-input-focus-shadow;
 $search-input-width: 220px;
 $location-badge-color: #aaa;
-$location-badge-bg: $gray-normal;
+$location-badge-bg: $dark-background-color;
 $location-badge-active-bg: #4f91f8;
 $location-icon-color: #e7e9ed;
 $location-icon-active-color: #807e7e;