src/sass/components/_utilities.scss to generate additional utility classes to cover its own design system.  
         The customized utility SASS variables are defined in src/sass/components/_variables.scss and in src/sass/components/_variables.custom.scss 
         you can override any variable for your needs.
    src/sass/components/_variables.scss:
    // Theme colors
$theme-colors: (
    "white":      $white,  // custom color type
    "primary":    $primary,
    "secondary":  $secondary,
    "success":    $success,
    "info":       $info,
    "warning":    $warning,
    "danger":     $danger,
    "light":      $light,
    "dark":       $dark
) !default;
// Active and hover states colors
$theme-active-colors: (
    "white":      $white-active,   // custom color type
    "primary":    $primary-active,
    "secondary":  $secondary-active,
    "success":    $success-active,
    "info":       $info-active,
    "warning":    $warning-active,
    "danger":     $danger-active,
    "light":      $light-active,
    "dark":       $dark-active
) !default;  // Custom variable
// Inverse colors
$theme-inverse-colors: (
    "white":      $white-inverse,
    "primary":    $primary-inverse,
    "secondary":  $secondary-inverse,
    "success":    $success-inverse,
    "info":       $info-inverse,
    "warning":    $warning-inverse,
    "danger":     $danger-inverse,
    "light":      $light-inverse,
    "dark":       $dark-inverse
) !default;  // Custom variable
// Light colors
$theme-light-colors: (
    "white":      $white-light,
    "primary":    $primary-light,
    "secondary":  $secondary-light,
    "success":    $success-light,
    "info":       $info-light,
    "warning":    $warning-light,
    "danger":     $danger-light,
    "light":      $light-light,
    "dark":       $dark-light
) !default;  // Custom variable
// Text colors
$theme-text-colors: (
    "white":      $white,
    "primary":    $primary,
    "secondary":  $dark,
    "success":    $success,
    "info":       $info,
    "warning":    $warning,
    "danger":     $danger,
    "light":      $light,
    "dark":       $dark,
    "muted":      $text-muted,
    "gray-100":   $gray-100,
    "gray-200":   $gray-200,
    "gray-300":   $gray-300,
    "gray-400":   $gray-400,
    "gray-500":   $gray-500,
    "gray-600":   $gray-600,
    "gray-700":   $gray-700,
    "gray-800":   $gray-800,
    "gray-900":   $gray-900
) !default;  // Custom variableCustom variable comment in _variables.scss  file.
        $spacers: (
    0: 0,
    1: ($spacer * .25),
    2: ($spacer * .5),
    3: ($spacer * .75),
    4: ($spacer * 1), 
    5: ($spacer * 1.25), 
    6: ($spacer * 1.5), 
    7: ($spacer * 1.75), 
    8: ($spacer * 2), 
    9: ($spacer * 2.25),
    10: ($spacer * 2.5), 
    11: ($spacer * 2.75),
    12: ($spacer * 3),
    13: ($spacer * 3.25),
    14: ($spacer * 3.5),
    15: ($spacer * 3.75),
    16: ($spacer * 4),
    17: ($spacer * 4.25),
    18: ($spacer * 4.5),
    19: ($spacer * 4.75),
    20: ($spacer * 5)
);$font-sizes: (
    1: $h1-font-size,   // 22.75px
    2: $h2-font-size,   // 19.50px
    3: $h3-font-size,   // 17.55px
    4: $h4-font-size,   // 16.25px
    5: $h5-font-size,   // 14.95px
    6: $h6-font-size,   // 13.95px
    7: $font-size-base * 0.95,  // 12.35px
    8: $font-size-base * 0.85,  // 11.05px
    9: $font-size-base * 0.75,  // 9.75px
    10: $font-size-base * 0.5,  // 6.50px
    base: $font-size-base, // 13px
    fluid: 100%, // 100%
    
    2x: $font-size-base * 2,        // 26px
    2qx: $font-size-base * 2.25,    // 29.25px
    2hx: $font-size-base * 2.5,     // 32.5px
    2tx: $font-size-base * 2.75,    // 35.75px
    3x: $font-size-base * 3,        // 39px
    3qx: $font-size-base * 3.25,    // 42.25px
    3hx: $font-size-base * 3.5,     // 45.5px
    3tx: $font-size-base * 3.75,    // 48.75px
    4x: $font-size-base * 4,        // 52px
    4qx: $font-size-base * 4.25,    // 55.25px
    4hx: $font-size-base * 4.5,     // 58.5px
    4tx: $font-size-base * 4.75,    // 61.75px
    
    5x: $font-size-base * 5,        // 65px
    5qx: $font-size-base * 5.25,    // 68.25px
    5hx: $font-size-base * 5.5,     // 71.5px
    5tx: $font-size-base * 5.75     // 74.75px
) !default;.lh-{value} class to set an element's line height where value is one of:
    1 - for classes that set line height to 1
            sm - for classes that set line height to 1.25
            base - for classes that set line height to 1.5
            lg - for classes that set line height to 1.75
            xl - for classes that set line height to 2
            xxl - for classes that set line height to 2.25
            .lh-1.lh-sm.lh-base.lh-lg.lh-xl.lh-xxl<div class="lh-1">Example text for .lh-1</div>
<div class="lh-sm">Example text for .lh-sm</div>
<div class="lh-base">Example text for .lh-base</div>
<div class="lh-lg">Example text for .lh-lg</div>
<div class="lh-xl">Example text for .lh-xl</div>
<div class="lh-xxl">Example text for .lh-xxl</div>.ls-{value} class to set an element's letter spacing where value is one of:
    1 - for classes that set letter spacing to 0.1rem
            2 - for classes that set letter spacing to 0.115rem
            3 - for classes that set letter spacing to 0.125rem
            4 - for classes that set letter spacing to 0.25rem
            5 - for classes that set letter spacing to 0.5rem
            n1 - for classes that set letter spacing to -0.1rem
            n2 - for classes that set letter spacing to -0.115rem
            n3 - for classes that set letter spacing to -0.125rem
            n4 - for classes that set letter spacing to -0.25rem
            n5 - for classes that set letter spacing to -0.5rem
            .ls-1.ls-2.ls-3.ls-4.ls-5.ls-n1.ls-n2.ls-n3.ls-n4.ls-n5<div class="ls-1">Example text for .ls-1</div>
<div class="ls-2">Example text for .ls-2</div>
<div class="ls-3">Example text for .ls-3</div>
<div class="ls-4">Example text for .ls-4</div>
<div class="ls-5">Example text for .ls-5</div>
<div class="ls-n1">Example text for .ls-n1</div>
<div class="ls-n2">Example text for .ls-n2</div>
<div class="ls-n3">Example text for .ls-n3</div>
<div class="ls-n4">Example text for .ls-n4</div>
<div class="ls-n5">Example text for .ls-n5</div>height, min-height, max-height, width , min-with and 
        max-width values to an element with shorthand classes.
        The classes are named using the format {property}-{size} for xs and {property}-{breakpoint}-{size} 
        for sm, md, lg, xl, and xxl.
    property is one of:
        h - for classes that set heightmh - for classes that set max heightmin-h - for classes that set min heightw - for classes that set widthmw - for classes that set max widthmin-w - for classes that set min widthsize defined with $custom-sizes variable in sass/_variables.scss is one of-
        25 - for 25%50 - for 50%75 - for 75%100 - for 100%auto - for auto1px2px3px4px5px6px7px8px9px10px15px20px25px30px35px40px45px50px55px60px65px70px75px80px85px90px95px100px125px150px175px200px225px250px275px300px325px350px375px400px425px450px475px500px550px600px650px700px750px800px850px900px950px1000px<div class="w-100px h-100px"></div>
<div class="w-150px h-150px"></div>
<div class="w-200px h-200px"></div>
<div class="w-250px h-250px"></div>
<div class="min-w-100px min-h-100px mw-100px mh-100px"></div>
<div class="min-w-150px min-h-150px mw-150px mh-150px"></div>
<div class="min-w-200px min-h-200px mw-200px mh-200px"></div>
<div class="min-w-250px min-h-250px mw-250px mh-250px"></div>.z-index-{value} class to set an element's z-index:        
    value is one of:
        n1 - for classes that set z-index n1
                n2 - for classes that set z-index n2
                0 - for classes that set z-index 0
                1 - for classes that set z-index 1
                2 - for classes that set z-index 2
                3 - for classes that set z-index 3
                <div class="z-index-n1"></div>
<div class="z-index-n2"></div>
<div class="z-index-0"></div>
<div class="z-index-1"></div>
<div class="z-index-2"></div>
<div class="z-index-3"></div>--kt-primary - Primary color hex value.
                --kt-success - Success color hex value.
                --kt-info - Info color hex value.
                --kt-danger - Danger color hex value.
                --kt-warning - Warning color hex value.
                --kt-dark - Dark color hex value.
                --kt-light - Light color hex value.
                --kt-gray-100 - Gray 100 color hex value.
                --kt-gray-200 - Gray 200 color hex value.
                --kt-gray-300 - Gray 300 color hex value.
                --kt-gray-500 - Gray 400 color hex value.
                --kt-gray-500 - Gray 500 color hex value.
                --kt-gray-600 - Gray 600 color hex value.
                --kt-gray-700 - Gray 700 color hex value.
                --kt-gray-800 - Gray 800 color hex value.
                --kt-gray-900 - Gray 900 color hex value.
                --kt-xs - Extra small breakpoint width value - 0.
                --kt-sm - Extra small breakpoint width value - 576px.
                --kt-md - Medium small breakpoint width value - 768px.
                --kt-lg - Large small breakpoint width value - 992px.
                --kt-xl - Extra large small breakpoint width value - 1200px.
                --kt-xxl - Double extra large breakpoint width value - 1400px.
                --kt-font-sans-serif - Main font family. E.g: "Roboto", sans-serif.
                KTUtil.getCssVariableValue('css variable name').var primaryColor = KTUtil.getCssVariableValue("--kt-primary");
var breakpointLg = KTUtil.getCssVariableValue("--kt-lg");
var fontFamily = KTUtil.getCssVariableValue("--kt-font-sans-serif");