Esse Blockquote é o mesmo que eu uso.

.post-body blockquote {background: #e7c9fb; /*Cor do Fundo*/padding: 8px;color: #ffffff; /*Cor do Texto*/border-bottom: 5px solid;border-color: #d0edfb; /*Cor da Borda*/-webkit-transition: all 1s linear;-moz-transition: all 1s linear;}.post-body blockquote:hover {border-bottom: 5px solid;border-color: #f5cae7; /*Cor da Borda Hover*/-webkit-transition: all 1s linear;-moz-transition: all 1s linear;}