Define style to any elements which has a class that starts with "boxset", for an example, classes such as name "boxset-one", "boxset-two", "boxset-blah-blah" etc. DEMO Class .boxset Class .boxset-one Class .boxset-two HTML < h2 class = "boxset" > Class . boxset </ h2 > < h2 class = "boxset-one" > Class . boxset - one </ h2 > < h2 class = "boxset-two" > Class . boxset - two </ h2 > CSS [class ^= "boxset" ] { color: magenta; }