src/sass/_utilities.scssto generate additional utility classes to cover its own design system. The customized utility SASS variables are defined in
											src/sass/_variables.scssand in
											src/sass/_variables.custom.scssyou can override any variable for your needs.src/sass/_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 variable
													Custom variablecomment 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
											valueis one of:1- for classes that set line height to
												1sm- for classes that set line height to
												1.25base- for classes that set line height to
												1.5lg- for classes that set line height to
												1.75xl- for classes that set line height to
												2xxl- 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
											valueis one of:1- for classes that set letter spacing to
												0.1rem2- for classes that set letter spacing to
												0.115rem3- for classes that set letter spacing to
												0.125rem4- for classes that set letter spacing to
												0.25rem5- for classes that set letter spacing to
												0.5rem.ls-1.ls-2.ls-3.ls-4.ls-5
<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>
													height,
											min-height,
											max-height,
											width,
											min-withand
											max-widthvalues to an element with shorthand classes. The classes are named using the format
											{property}-{size}for
											xsand
											{property}-{breakpoint}-{size}for
											sm,
											md,
											lg,
											xl, and
											xxl.propertyis 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 widthsizedefined with
											$custom-sizesvariable in
											sass/_variables.scssis one of-
											25- for 25%50- for 50%75- for 75%100- for 100%auto- for auto1px
												2px
												3px
												4px
												5px
												6px
												7px
												8px
												9px
												10px
												15px
												20px
												25px
												30px
												35px
												40px
												45px
												50px
												55px
												60px
												65px
												70px
												75px
												80px
												85px
												90px
												95px
												100px
												125px
												150px
												175px
												200px
												225px
												250px
												275px
												300px
												325px
												350px
												375px
												400px
												425px
												450px
												475px
												500px
												550px
												600px
												650px
												700px
												750px
												800px
												850px
												900px
												950px
												1000px
												
<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:valueis one of:
											n1- for classes that set z-index
												n1n2- for classes that set z-index
												n20- for classes that set z-index
												01- for classes that set z-index
												12- for classes that set z-index
												23- 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>