Встроенный стиль Vue
<div :style="{color: ' #f67e7e'}" ></div>
Grieving Gharial
<div :style="{color: ' #f67e7e'}" ></div><div v-bind:style="{ color: activeColor, fontSize: fontSize + 'px' }"></div><div :class="{ 'prop-name': boolVar }"></div><div v-bind:class="{ active: isActive }"></div>
<div v-bind:class="[{ active: isActive }, errorClass]"></div>//use a coma (,) instad (;)
// (background-color) in vue (backgroundColor)
:style="{width: '40px', height: '40px', backgroundColor:'red'}"
// if help full give a like