Implement LESSCSS color palette stylesheet

src/lesscss/nord.less

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+/*
+++++++++++++++++++++++++++++++++++++++++++++++++++++
+title      Nord                                    +
+project    nord                                    +
+version                                            +
+repository https://github.com/arcticicestudio/nord +
+author     Arctic Ice Studio                       +
+email      [email protected]         +
+copyright  Copyright (C) 2016                      +
+++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+[References]
+KSS
+  (http://warpspire.com/kss)
+kss-node
+  (https://github.com/kss-node/kss-node)
+*/
+
+// A arctic, north-bluish color palette.
+// Created for the clean- and minimal design pattern to achieve a optimal focus and readability for code syntax
+// highlighting and UI.
+// It consists of a total of sixteen, carefully selected, dimmed pastel colors for a eye-comfortable, but yet colorful
+// ambiance.
+//
+// Styleguide Nord
+
+// Base component color of "Polar Night".
+//
+// Used for texts, backgrounds, carets and structuring characters like curly- and square brackets.
+//
+// Markup:
+// <div style="background-color:#2E3440; width=60; height=60"></div>
+//
+// Styleguide Nord - Polar Night
+@nord0: #2E3440;
+
+// Lighter shade color of the base component color.
+//
+// Used as a lighter background color for UI elements like status bars.
+//
+// Markup:
+// <div style="background-color:#3B4252; width=60; height=60"></div>
+//
+// Styleguide Nord - Polar Night
+@nord1: #3B4252;
+
+// Lighter shade color of the base component color.
+//
+// Used as line highlighting in the editor.  
+// In the UI scope it may be used as selection- and hightlight color.
+//
+// Markup:
+// <div style="background-color:#434C5E; width=60; height=60"></div>
+//
+// Styleguide Nord - Polar Night
+@nord2: #434C5E;
+
+// Lighter shade color of the base component color.
+//
+// Used for comments, invisibles, indent- and wrap guide marker.  
+// In the UI scope it may be used as pseudeoclass color for disabled elements.
+//
+// Markup:
+// <div style="background-color:#4C566A; width=60; height=60"></div>
+//
+// Styleguide Nord - Polar Night
+@nord3: #4C566A;
+
+// Base component color of "Snow Storm".
+//
+// Used for texts, carets and structuring characters like curly- and square brackets.  
+// In the UI scope it may be used as semi-light background depending on the theme shading design.
+//
+// Markup:
+// <div style="background-color:#D8DEE9; width=60; height=60"></div>
+//
+// Styleguide Nord - Snow Storm
+@nord4: #D8DEE9;
+
+// Lighter shade color of the base component color.
+//
+// Used as a lighter background color for UI elements like status bars.  
+// It may also be used as semi-light background depending on the theme shading design.
+//
+// Markup:
+// <div style="background-color:#E5E9F0; width=60; height=60"></div>
+//
+// Styleguide Nord - Snow Storm
+@nord5: #E5E9F0;
+
+// Lighter shade color of the base component color.
+//
+// Usually be used as background depending on the theme shading design.  
+// In the UI scope it may be used as selection- and hightlight color.
+//
+// Markup:
+// <div style="background-color:#ECEFF4; width=60; height=60"></div>
+//
+// Styleguide Nord - Snow Storm
+@nord6: #ECEFF4;
+
+// Bluish core color.
+//
+// Most commonly used for
+//   - classes/types
+//   - attributes
+//   - constants
+//
+// Markup:
+// <div style="background-color:#8FBCBB; width=60; height=60"></div>
+//
+// Styleguide Nord - Frost
+@nord7: #8FBCBB;
+
+// Bluish core color.
+//
+// Represents the accent color of the color palette.  
+// Can be used as main color for primary UI elements.  
+// Optionally used for methods/functions instead of @nord14
+//
+// Also commonly used for
+//   - documentation/annotation tags
+//   - attribute values
+//   - Markup quotes
+//   - Markup link URLs
+//
+// Markup:
+// <div style="background-color:#88C0D0; width=60; height=60"></div>
+//
+// Styleguide Nord - Frost
+@nord8: #88C0D0;
+
+// Bluish core color.
+//
+// Most commonly used for
+//   - language-specific syntactic/reserved keywords
+//   - operators
+//   - tags
+//   - punctuations like colon/semicolon, comma and braces
+//
+// Can optionally be used for units and language-specific reserved special support characters (px/em, $, %).
+//
+// Markup:
+// <div style="background-color:#81A1C1; width=60; height=60"></div>
+//
+// Styleguide Nord - Frost
+@nord9: #81A1C1;
+
+// Bluish core color.
+//
+// Most commonly used for
+//   - Markup doctypes
+//   - import/include/require statements
+//   - pre-processor statements
+//   - at-rules (@)
+//
+// Markup:
+// <div style="background-color:#5E81AC; width=60; height=60"></div>
+//
+// Styleguide Nord - Frost
+@nord10: #5E81AC;
+
+// Colorful component color.
+//
+// Most commonly used for errors, git/diff deletion and linter marker.
+//
+// Markup:
+// <div style="background-color:#BF616A; width=60; height=60"></div>
+//
+// Styleguide Nord - Aurora
+@nord11: #BF616A;
+
+// Colorful component color.
+//
+// Most commonly used for annotations and regular expressions.
+//
+// Markup:
+// <div style="background-color:#D08770; width=60; height=60"></div>
+//
+// Styleguide Nord - Aurora
+@nord12: #D08770;
+
+// Colorful component color.
+//
+// Most commonly used for escape characters, warnings, git/diff renamings and Markup entities.
+//
+// Markup:
+// <div style="background-color:#EBCB8B; width=60; height=60"></div>
+//
+// Styleguide Nord - Aurora
+@nord13: #EBCB8B;
+
+// Colorful component color.
+//
+// Most commonly used for methods/functions, git/diff additions and success visualizations.
+//
+// Markup:
+// <div style="background-color:#A3BE8C; width=60; height=60"></div>
+//
+// Styleguide Nord - Aurora
+@nord14: #A3BE8C;
+
+// Colorful component color.
+//
+// Most commonly used for numbers.
+//
+// Markup:
+// <div style="background-color:#B48EAD; width=60; height=60"></div>
+//
+// Styleguide Nord - Aurora
+@nord15: #B48EAD;