As part of WFP UI, we maintain our own bootstrap-theme.css, which is a drop-in skin for Bootstrap 3. You can find it alongside wfpui.css, under dist/css/bootstrap-theme.css.
<!-- Bower -->
<link rel="stylesheet" href="bower_components/wfp-ui/dist/css/bootstrap-theme.css">
<!-- WFP CDN -->
<link rel="stylesheet" href="http://cdn.wfp.org/libraries/wfpui/v0.8.0/css/bootstrap-theme.css">Notice
Bootstrap theme is not a direct replacement for WFP UI. It only makes use of generic visual styles, colours, typography, and spacing, but keeps native Bootstrap components untouched, in terms of design and structure.