BookStack/resources/assets/sass/_colors.scss

/*
 * Status text colors
 */
.text-pos, .text-pos:hover, .text-pos-hover:hover {
  color: $positive !important;
  fill: $positive !important;
}

.text-warn, .text-warn:hover, .text-warn-hover:hover {
  color: $warning !important;
  fill: $warning !important;
}

.text-neg, .text-neg:hover, .text-neg-hover:hover  {
  color: $negative !important;
  fill: $negative !important;
}

/*
 * Style text colors
 */
.text-primary, .text-primary:hover, .text-primary-hover:hover  {
  color: $primary !important;
  fill: $primary !important;
}

.text-muted {
  color: #575757 !important;
  fill: #575757 !important;
}

/*
 * Entity text colors
 */
.text-bookshelf, .text-bookshelf:hover {
  color: $color-bookshelf;
  fill: $color-bookshelf;
}
.text-book, .text-book:hover {
  color: $color-book;
  fill: $color-book;
}
.text-page, .text-page:hover {
  color: $color-page;
  fill: $color-page;
}
.text-page.draft, .text-page.draft:hover {
  color: $color-page-draft;
  fill: $color-page-draft;
}
.text-chapter, .text-chapter:hover {
  color: $color-chapter;
  fill: $color-chapter;
}

/*
 * Standard & Entity background colors
 */
.bg-white {
  background-color: #FFFFFF;
}
.bg-book {
  background-color: $color-book;
}
.bg-chapter {
  background-color: $color-chapter;
}
.bg-shelf {
  background-color: $color-bookshelf;
}