How to change carousel's indicators color in bootstrap?

 That's simple. you just over write the bootstrap css by creating a new css file. then you have to writhe the codes below:

.carousel-indicators button {

    display: inline-block !important;

    width: 48px !important;

    height: 48px !important;

    margin: 10px !important;

    text-indent: 0 !important;

    cursor: pointer !important;

    border: none !important;

    border-radius: 50% !important;

    background-color: #0000ff !important;

    box-shadow: inset 1px 1px 1px 1px rgba(0,0,0, 0.5);    

}