Bootstrap 4 Callouts pulled from https://v4-alpha.getbootstrap.com/assets/css/docs.min.css

callout.css

.bd-callout {
    padding: 1.25rem;
    margin-top: 1.25rem;
    margin-bottom: 1.25rem;
    border: 1px solid #eee;
    border-left-width: .25rem;
    border-radius: .25rem
}

.bd-callout h4 {
    margin-top: 0;
    margin-bottom: .25rem
}

.bd-callout p:last-child {
    margin-bottom: 0
}

.bd-callout code {
    border-radius: .25rem
}

.bd-callout+.bd-callout {
    margin-top: -.25rem
}

.bd-callout-info {
    border-left-color: #5bc0de
}

.bd-callout-info h4 {
    color: #5bc0de
}

.bd-callout-warning {
    border-left-color: #f0ad4e
}

.bd-callout-warning h4 {
    color: #f0ad4e
}

.bd-callout-danger {
    border-left-color: #d9534f
}

.bd-callout-danger h4 {
    color: #d9534f
}

Nice!

Love this. It looks great.

If anybody's using custom theme colours, this SCSS might help:

.callout {
  padding: 1.25rem;
  margin-top: 1.25rem;
  margin-bottom: 1.25rem;
  border: 1px solid #eee;
  border-left-width: .25rem;
  border-radius: .25rem;

  h2,h3,h4,h5 {
    margin-top: 0;
    margin-bottom: .25rem;
  }

  p:last-child {
    margin-bottom: 0;
  }

  code {
    border-radius: .25rem;
  }
}

@each $color, $value in $theme-colors {
  .callout-#{$color} {
    border-left-color: $value;

    h2,h3,h4,h5 {
      color: $value;
    }
  }
}

Love this. It looks great.

If anybody's using custom theme colours, this SCSS might help: ...

@jacobwalkr this is perfect, thank you!